aws_sdk_wellarchitected/operation/
list_lens_review_improvements.rs

1// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
2/// Orchestration and serialization glue logic for `ListLensReviewImprovements`.
3#[derive(::std::clone::Clone, ::std::default::Default, ::std::fmt::Debug)]
4#[non_exhaustive]
5pub struct ListLensReviewImprovements;
6impl ListLensReviewImprovements {
7    /// Creates a new `ListLensReviewImprovements`
8    pub fn new() -> Self {
9        Self
10    }
11    pub(crate) async fn orchestrate(
12        runtime_plugins: &::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
13        input: crate::operation::list_lens_review_improvements::ListLensReviewImprovementsInput,
14    ) -> ::std::result::Result<
15        crate::operation::list_lens_review_improvements::ListLensReviewImprovementsOutput,
16        ::aws_smithy_runtime_api::client::result::SdkError<
17            crate::operation::list_lens_review_improvements::ListLensReviewImprovementsError,
18            ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
19        >,
20    > {
21        let map_err = |err: ::aws_smithy_runtime_api::client::result::SdkError<
22            ::aws_smithy_runtime_api::client::interceptors::context::Error,
23            ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
24        >| {
25            err.map_service_error(|err| {
26                err.downcast::<crate::operation::list_lens_review_improvements::ListLensReviewImprovementsError>()
27                    .expect("correct error type")
28            })
29        };
30        let context = Self::orchestrate_with_stop_point(runtime_plugins, input, ::aws_smithy_runtime::client::orchestrator::StopPoint::None)
31            .await
32            .map_err(map_err)?;
33        let output = context.finalize().map_err(map_err)?;
34        ::std::result::Result::Ok(
35            output
36                .downcast::<crate::operation::list_lens_review_improvements::ListLensReviewImprovementsOutput>()
37                .expect("correct output type"),
38        )
39    }
40
41    pub(crate) async fn orchestrate_with_stop_point(
42        runtime_plugins: &::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
43        input: crate::operation::list_lens_review_improvements::ListLensReviewImprovementsInput,
44        stop_point: ::aws_smithy_runtime::client::orchestrator::StopPoint,
45    ) -> ::std::result::Result<
46        ::aws_smithy_runtime_api::client::interceptors::context::InterceptorContext,
47        ::aws_smithy_runtime_api::client::result::SdkError<
48            ::aws_smithy_runtime_api::client::interceptors::context::Error,
49            ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
50        >,
51    > {
52        let input = ::aws_smithy_runtime_api::client::interceptors::context::Input::erase(input);
53        use ::tracing::Instrument;
54        ::aws_smithy_runtime::client::orchestrator::invoke_with_stop_point(
55            "WellArchitected",
56            "ListLensReviewImprovements",
57            input,
58            runtime_plugins,
59            stop_point,
60        )
61        // Create a parent span for the entire operation. Includes a random, internal-only,
62        // seven-digit ID for the operation orchestration so that it can be correlated in the logs.
63        .instrument(::tracing::debug_span!(
64            "WellArchitected.ListLensReviewImprovements",
65            "rpc.service" = "WellArchitected",
66            "rpc.method" = "ListLensReviewImprovements",
67            "sdk_invocation_id" = ::fastrand::u32(1_000_000..10_000_000),
68            "rpc.system" = "aws-api",
69        ))
70        .await
71    }
72
73    pub(crate) fn operation_runtime_plugins(
74        client_runtime_plugins: ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
75        client_config: &crate::config::Config,
76        config_override: ::std::option::Option<crate::config::Builder>,
77    ) -> ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins {
78        let mut runtime_plugins = client_runtime_plugins.with_operation_plugin(Self::new());
79
80        if let ::std::option::Option::Some(config_override) = config_override {
81            for plugin in config_override.runtime_plugins.iter().cloned() {
82                runtime_plugins = runtime_plugins.with_operation_plugin(plugin);
83            }
84            runtime_plugins = runtime_plugins.with_operation_plugin(crate::config::ConfigOverrideRuntimePlugin::new(
85                config_override,
86                client_config.config.clone(),
87                &client_config.runtime_components,
88            ));
89        }
90        runtime_plugins
91    }
92}
93impl ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugin for ListLensReviewImprovements {
94    fn config(&self) -> ::std::option::Option<::aws_smithy_types::config_bag::FrozenLayer> {
95        let mut cfg = ::aws_smithy_types::config_bag::Layer::new("ListLensReviewImprovements");
96
97        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedRequestSerializer::new(
98            ListLensReviewImprovementsRequestSerializer,
99        ));
100        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedResponseDeserializer::new(
101            ListLensReviewImprovementsResponseDeserializer,
102        ));
103
104        cfg.store_put(::aws_smithy_runtime_api::client::auth::AuthSchemeOptionResolverParams::new(
105            crate::config::auth::Params::builder()
106                .operation_name("ListLensReviewImprovements")
107                .build()
108                .expect("required fields set"),
109        ));
110
111        cfg.store_put(::aws_smithy_runtime_api::client::orchestrator::Metadata::new(
112            "ListLensReviewImprovements",
113            "WellArchitected",
114        ));
115        let mut signing_options = ::aws_runtime::auth::SigningOptions::default();
116        signing_options.double_uri_encode = true;
117        signing_options.content_sha256_header = false;
118        signing_options.normalize_uri_path = true;
119        signing_options.payload_override = None;
120
121        cfg.store_put(::aws_runtime::auth::SigV4OperationSigningConfig {
122            signing_options,
123            ..::std::default::Default::default()
124        });
125
126        ::std::option::Option::Some(cfg.freeze())
127    }
128
129    fn runtime_components(
130        &self,
131        _: &::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder,
132    ) -> ::std::borrow::Cow<'_, ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder> {
133        #[allow(unused_mut)]
134        let mut rcb = ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder::new("ListLensReviewImprovements")
135            .with_interceptor(::aws_smithy_runtime::client::stalled_stream_protection::StalledStreamProtectionInterceptor::default())
136            .with_interceptor(ListLensReviewImprovementsEndpointParamsInterceptor)
137            .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::TransientErrorClassifier::<
138                crate::operation::list_lens_review_improvements::ListLensReviewImprovementsError,
139            >::new())
140            .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::ModeledAsRetryableClassifier::<
141                crate::operation::list_lens_review_improvements::ListLensReviewImprovementsError,
142            >::new())
143            .with_retry_classifier(::aws_runtime::retries::classifiers::AwsErrorCodeClassifier::<
144                crate::operation::list_lens_review_improvements::ListLensReviewImprovementsError,
145            >::new());
146
147        ::std::borrow::Cow::Owned(rcb)
148    }
149}
150
151#[derive(Debug)]
152struct ListLensReviewImprovementsResponseDeserializer;
153impl ::aws_smithy_runtime_api::client::ser_de::DeserializeResponse for ListLensReviewImprovementsResponseDeserializer {
154    fn deserialize_nonstreaming(
155        &self,
156        response: &::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
157    ) -> ::aws_smithy_runtime_api::client::interceptors::context::OutputOrError {
158        let (success, status) = (response.status().is_success(), response.status().as_u16());
159        let headers = response.headers();
160        let body = response.body().bytes().expect("body loaded");
161        #[allow(unused_mut)]
162        let mut force_error = false;
163        ::tracing::debug!(request_id = ?::aws_types::request_id::RequestId::request_id(response));
164        let parse_result = if !success && status != 200 || force_error {
165            crate::protocol_serde::shape_list_lens_review_improvements::de_list_lens_review_improvements_http_error(status, headers, body)
166        } else {
167            crate::protocol_serde::shape_list_lens_review_improvements::de_list_lens_review_improvements_http_response(status, headers, body)
168        };
169        crate::protocol_serde::type_erase_result(parse_result)
170    }
171}
172#[derive(Debug)]
173struct ListLensReviewImprovementsRequestSerializer;
174impl ::aws_smithy_runtime_api::client::ser_de::SerializeRequest for ListLensReviewImprovementsRequestSerializer {
175    #[allow(unused_mut, clippy::let_and_return, clippy::needless_borrow, clippy::useless_conversion)]
176    fn serialize_input(
177        &self,
178        input: ::aws_smithy_runtime_api::client::interceptors::context::Input,
179        _cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
180    ) -> ::std::result::Result<::aws_smithy_runtime_api::client::orchestrator::HttpRequest, ::aws_smithy_runtime_api::box_error::BoxError> {
181        let input = input
182            .downcast::<crate::operation::list_lens_review_improvements::ListLensReviewImprovementsInput>()
183            .expect("correct type");
184        let _header_serialization_settings = _cfg
185            .load::<crate::serialization_settings::HeaderSerializationSettings>()
186            .cloned()
187            .unwrap_or_default();
188        let mut request_builder = {
189            #[allow(clippy::uninlined_format_args)]
190            fn uri_base(
191                _input: &crate::operation::list_lens_review_improvements::ListLensReviewImprovementsInput,
192                output: &mut ::std::string::String,
193            ) -> ::std::result::Result<(), ::aws_smithy_types::error::operation::BuildError> {
194                use ::std::fmt::Write as _;
195                let input_1 = &_input.workload_id;
196                let input_1 = input_1
197                    .as_ref()
198                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("workload_id", "cannot be empty or unset"))?;
199                let workload_id = ::aws_smithy_http::label::fmt_string(input_1, ::aws_smithy_http::label::EncodingStrategy::Default);
200                if workload_id.is_empty() {
201                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
202                        "workload_id",
203                        "cannot be empty or unset",
204                    ));
205                }
206                let input_2 = &_input.lens_alias;
207                let input_2 = input_2
208                    .as_ref()
209                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("lens_alias", "cannot be empty or unset"))?;
210                let lens_alias = ::aws_smithy_http::label::fmt_string(input_2, ::aws_smithy_http::label::EncodingStrategy::Default);
211                if lens_alias.is_empty() {
212                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
213                        "lens_alias",
214                        "cannot be empty or unset",
215                    ));
216                }
217                ::std::write!(
218                    output,
219                    "/workloads/{WorkloadId}/lensReviews/{LensAlias}/improvements",
220                    WorkloadId = workload_id,
221                    LensAlias = lens_alias
222                )
223                .expect("formatting should succeed");
224                ::std::result::Result::Ok(())
225            }
226            fn uri_query(
227                _input: &crate::operation::list_lens_review_improvements::ListLensReviewImprovementsInput,
228                mut output: &mut ::std::string::String,
229            ) -> ::std::result::Result<(), ::aws_smithy_types::error::operation::BuildError> {
230                let mut query = ::aws_smithy_http::query::Writer::new(output);
231                if let ::std::option::Option::Some(inner_3) = &_input.pillar_id {
232                    {
233                        query.push_kv("PillarId", &::aws_smithy_http::query::fmt_string(inner_3));
234                    }
235                }
236                if let ::std::option::Option::Some(inner_4) = &_input.milestone_number {
237                    {
238                        query.push_kv("MilestoneNumber", ::aws_smithy_types::primitive::Encoder::from(*inner_4).encode());
239                    }
240                }
241                if let ::std::option::Option::Some(inner_5) = &_input.next_token {
242                    {
243                        query.push_kv("NextToken", &::aws_smithy_http::query::fmt_string(inner_5));
244                    }
245                }
246                if let ::std::option::Option::Some(inner_6) = &_input.max_results {
247                    {
248                        query.push_kv("MaxResults", ::aws_smithy_types::primitive::Encoder::from(*inner_6).encode());
249                    }
250                }
251                if let ::std::option::Option::Some(inner_7) = &_input.question_priority {
252                    {
253                        query.push_kv("QuestionPriority", &::aws_smithy_http::query::fmt_string(inner_7));
254                    }
255                }
256                ::std::result::Result::Ok(())
257            }
258            #[allow(clippy::unnecessary_wraps)]
259            fn update_http_builder(
260                input: &crate::operation::list_lens_review_improvements::ListLensReviewImprovementsInput,
261                builder: ::http::request::Builder,
262            ) -> ::std::result::Result<::http::request::Builder, ::aws_smithy_types::error::operation::BuildError> {
263                let mut uri = ::std::string::String::new();
264                uri_base(input, &mut uri)?;
265                uri_query(input, &mut uri)?;
266                ::std::result::Result::Ok(builder.method("GET").uri(uri))
267            }
268            let mut builder = update_http_builder(&input, ::http::request::Builder::new())?;
269            builder
270        };
271        let body = ::aws_smithy_types::body::SdkBody::from("");
272
273        ::std::result::Result::Ok(request_builder.body(body).expect("valid request").try_into().unwrap())
274    }
275}
276#[derive(Debug)]
277struct ListLensReviewImprovementsEndpointParamsInterceptor;
278
279impl ::aws_smithy_runtime_api::client::interceptors::Intercept for ListLensReviewImprovementsEndpointParamsInterceptor {
280    fn name(&self) -> &'static str {
281        "ListLensReviewImprovementsEndpointParamsInterceptor"
282    }
283
284    fn read_before_execution(
285        &self,
286        context: &::aws_smithy_runtime_api::client::interceptors::context::BeforeSerializationInterceptorContextRef<
287            '_,
288            ::aws_smithy_runtime_api::client::interceptors::context::Input,
289            ::aws_smithy_runtime_api::client::interceptors::context::Output,
290            ::aws_smithy_runtime_api::client::interceptors::context::Error,
291        >,
292        cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
293    ) -> ::std::result::Result<(), ::aws_smithy_runtime_api::box_error::BoxError> {
294        let _input = context
295            .input()
296            .downcast_ref::<ListLensReviewImprovementsInput>()
297            .ok_or("failed to downcast to ListLensReviewImprovementsInput")?;
298
299        let params = crate::config::endpoint::Params::builder()
300            .set_region(cfg.load::<::aws_types::region::Region>().map(|r| r.as_ref().to_owned()))
301            .set_use_dual_stack(cfg.load::<::aws_types::endpoint_config::UseDualStack>().map(|ty| ty.0))
302            .set_use_fips(cfg.load::<::aws_types::endpoint_config::UseFips>().map(|ty| ty.0))
303            .set_endpoint(cfg.load::<::aws_types::endpoint_config::EndpointUrl>().map(|ty| ty.0.clone()))
304            .build()
305            .map_err(|err| {
306                ::aws_smithy_runtime_api::client::interceptors::error::ContextAttachedError::new("endpoint params could not be built", err)
307            })?;
308        cfg.interceptor_state()
309            .store_put(::aws_smithy_runtime_api::client::endpoint::EndpointResolverParams::new(params));
310        ::std::result::Result::Ok(())
311    }
312}
313
314// The get_* functions below are generated from JMESPath expressions in the
315// operationContextParams trait. They target the operation's input shape.
316
317/// Error type for the `ListLensReviewImprovementsError` operation.
318#[non_exhaustive]
319#[derive(::std::fmt::Debug)]
320pub enum ListLensReviewImprovementsError {
321    /// <p>User does not have sufficient access to perform this action.</p>
322    AccessDeniedException(crate::types::error::AccessDeniedException),
323    /// <p>There is a problem with the Well-Architected Tool API service.</p>
324    InternalServerException(crate::types::error::InternalServerException),
325    /// <p>The requested resource was not found.</p>
326    ResourceNotFoundException(crate::types::error::ResourceNotFoundException),
327    /// <p>Request was denied due to request throttling.</p>
328    ThrottlingException(crate::types::error::ThrottlingException),
329    /// <p>The user input is not valid.</p>
330    ValidationException(crate::types::error::ValidationException),
331    /// An unexpected error occurred (e.g., invalid JSON returned by the service or an unknown error code).
332    #[deprecated(note = "Matching `Unhandled` directly is not forwards compatible. Instead, match using a \
333    variable wildcard pattern and check `.code()`:
334     \
335    &nbsp;&nbsp;&nbsp;`err if err.code() == Some(\"SpecificExceptionCode\") => { /* handle the error */ }`
336     \
337    See [`ProvideErrorMetadata`](#impl-ProvideErrorMetadata-for-ListLensReviewImprovementsError) for what information is available for the error.")]
338    Unhandled(crate::error::sealed_unhandled::Unhandled),
339}
340impl ListLensReviewImprovementsError {
341    /// Creates the `ListLensReviewImprovementsError::Unhandled` variant from any error type.
342    pub fn unhandled(
343        err: impl ::std::convert::Into<::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>>,
344    ) -> Self {
345        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
346            source: err.into(),
347            meta: ::std::default::Default::default(),
348        })
349    }
350
351    /// Creates the `ListLensReviewImprovementsError::Unhandled` variant from an [`ErrorMetadata`](::aws_smithy_types::error::ErrorMetadata).
352    pub fn generic(err: ::aws_smithy_types::error::ErrorMetadata) -> Self {
353        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
354            source: err.clone().into(),
355            meta: err,
356        })
357    }
358    ///
359    /// Returns error metadata, which includes the error code, message,
360    /// request ID, and potentially additional information.
361    ///
362    pub fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
363        match self {
364            Self::AccessDeniedException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
365            Self::InternalServerException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
366            Self::ResourceNotFoundException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
367            Self::ThrottlingException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
368            Self::ValidationException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
369            Self::Unhandled(e) => &e.meta,
370        }
371    }
372    /// Returns `true` if the error kind is `ListLensReviewImprovementsError::AccessDeniedException`.
373    pub fn is_access_denied_exception(&self) -> bool {
374        matches!(self, Self::AccessDeniedException(_))
375    }
376    /// Returns `true` if the error kind is `ListLensReviewImprovementsError::InternalServerException`.
377    pub fn is_internal_server_exception(&self) -> bool {
378        matches!(self, Self::InternalServerException(_))
379    }
380    /// Returns `true` if the error kind is `ListLensReviewImprovementsError::ResourceNotFoundException`.
381    pub fn is_resource_not_found_exception(&self) -> bool {
382        matches!(self, Self::ResourceNotFoundException(_))
383    }
384    /// Returns `true` if the error kind is `ListLensReviewImprovementsError::ThrottlingException`.
385    pub fn is_throttling_exception(&self) -> bool {
386        matches!(self, Self::ThrottlingException(_))
387    }
388    /// Returns `true` if the error kind is `ListLensReviewImprovementsError::ValidationException`.
389    pub fn is_validation_exception(&self) -> bool {
390        matches!(self, Self::ValidationException(_))
391    }
392}
393impl ::std::error::Error for ListLensReviewImprovementsError {
394    fn source(&self) -> ::std::option::Option<&(dyn ::std::error::Error + 'static)> {
395        match self {
396            Self::AccessDeniedException(_inner) => ::std::option::Option::Some(_inner),
397            Self::InternalServerException(_inner) => ::std::option::Option::Some(_inner),
398            Self::ResourceNotFoundException(_inner) => ::std::option::Option::Some(_inner),
399            Self::ThrottlingException(_inner) => ::std::option::Option::Some(_inner),
400            Self::ValidationException(_inner) => ::std::option::Option::Some(_inner),
401            Self::Unhandled(_inner) => ::std::option::Option::Some(&*_inner.source),
402        }
403    }
404}
405impl ::std::fmt::Display for ListLensReviewImprovementsError {
406    fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
407        match self {
408            Self::AccessDeniedException(_inner) => _inner.fmt(f),
409            Self::InternalServerException(_inner) => _inner.fmt(f),
410            Self::ResourceNotFoundException(_inner) => _inner.fmt(f),
411            Self::ThrottlingException(_inner) => _inner.fmt(f),
412            Self::ValidationException(_inner) => _inner.fmt(f),
413            Self::Unhandled(_inner) => {
414                if let ::std::option::Option::Some(code) = ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self) {
415                    write!(f, "unhandled error ({code})")
416                } else {
417                    f.write_str("unhandled error")
418                }
419            }
420        }
421    }
422}
423impl ::aws_smithy_types::retry::ProvideErrorKind for ListLensReviewImprovementsError {
424    fn code(&self) -> ::std::option::Option<&str> {
425        ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self)
426    }
427    fn retryable_error_kind(&self) -> ::std::option::Option<::aws_smithy_types::retry::ErrorKind> {
428        ::std::option::Option::None
429    }
430}
431impl ::aws_smithy_types::error::metadata::ProvideErrorMetadata for ListLensReviewImprovementsError {
432    fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
433        match self {
434            Self::AccessDeniedException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
435            Self::InternalServerException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
436            Self::ResourceNotFoundException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
437            Self::ThrottlingException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
438            Self::ValidationException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
439            Self::Unhandled(_inner) => &_inner.meta,
440        }
441    }
442}
443impl ::aws_smithy_runtime_api::client::result::CreateUnhandledError for ListLensReviewImprovementsError {
444    fn create_unhandled_error(
445        source: ::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>,
446        meta: ::std::option::Option<::aws_smithy_types::error::ErrorMetadata>,
447    ) -> Self {
448        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
449            source,
450            meta: meta.unwrap_or_default(),
451        })
452    }
453}
454impl ::aws_types::request_id::RequestId for crate::operation::list_lens_review_improvements::ListLensReviewImprovementsError {
455    fn request_id(&self) -> Option<&str> {
456        self.meta().request_id()
457    }
458}
459
460pub use crate::operation::list_lens_review_improvements::_list_lens_review_improvements_output::ListLensReviewImprovementsOutput;
461
462pub use crate::operation::list_lens_review_improvements::_list_lens_review_improvements_input::ListLensReviewImprovementsInput;
463
464mod _list_lens_review_improvements_input;
465
466mod _list_lens_review_improvements_output;
467
468/// Builders
469pub mod builders;
470
471/// Paginator for this operation
472pub mod paginator;