aws_sdk_lexmodelsv2/operation/
list_custom_vocabulary_items.rs

1// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
2/// Orchestration and serialization glue logic for `ListCustomVocabularyItems`.
3#[derive(::std::clone::Clone, ::std::default::Default, ::std::fmt::Debug)]
4#[non_exhaustive]
5pub struct ListCustomVocabularyItems;
6impl ListCustomVocabularyItems {
7    /// Creates a new `ListCustomVocabularyItems`
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_custom_vocabulary_items::ListCustomVocabularyItemsInput,
14    ) -> ::std::result::Result<
15        crate::operation::list_custom_vocabulary_items::ListCustomVocabularyItemsOutput,
16        ::aws_smithy_runtime_api::client::result::SdkError<
17            crate::operation::list_custom_vocabulary_items::ListCustomVocabularyItemsError,
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_custom_vocabulary_items::ListCustomVocabularyItemsError>()
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_custom_vocabulary_items::ListCustomVocabularyItemsOutput>()
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_custom_vocabulary_items::ListCustomVocabularyItemsInput,
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            "Lex Models V2",
56            "ListCustomVocabularyItems",
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            "Lex Models V2.ListCustomVocabularyItems",
65            "rpc.service" = "Lex Models V2",
66            "rpc.method" = "ListCustomVocabularyItems",
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 ListCustomVocabularyItems {
94    fn config(&self) -> ::std::option::Option<::aws_smithy_types::config_bag::FrozenLayer> {
95        let mut cfg = ::aws_smithy_types::config_bag::Layer::new("ListCustomVocabularyItems");
96
97        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedRequestSerializer::new(
98            ListCustomVocabularyItemsRequestSerializer,
99        ));
100        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedResponseDeserializer::new(
101            ListCustomVocabularyItemsResponseDeserializer,
102        ));
103
104        cfg.store_put(::aws_smithy_runtime_api::client::auth::AuthSchemeOptionResolverParams::new(
105            crate::config::auth::Params::builder()
106                .operation_name("ListCustomVocabularyItems")
107                .build()
108                .expect("required fields set"),
109        ));
110
111        cfg.store_put(::aws_smithy_runtime_api::client::orchestrator::Metadata::new(
112            "ListCustomVocabularyItems",
113            "Lex Models V2",
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("ListCustomVocabularyItems")
135            .with_interceptor(::aws_smithy_runtime::client::stalled_stream_protection::StalledStreamProtectionInterceptor::default())
136            .with_interceptor(ListCustomVocabularyItemsEndpointParamsInterceptor)
137            .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::TransientErrorClassifier::<
138                crate::operation::list_custom_vocabulary_items::ListCustomVocabularyItemsError,
139            >::new())
140            .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::ModeledAsRetryableClassifier::<
141                crate::operation::list_custom_vocabulary_items::ListCustomVocabularyItemsError,
142            >::new())
143            .with_retry_classifier(::aws_runtime::retries::classifiers::AwsErrorCodeClassifier::<
144                crate::operation::list_custom_vocabulary_items::ListCustomVocabularyItemsError,
145            >::new());
146
147        ::std::borrow::Cow::Owned(rcb)
148    }
149}
150
151#[derive(Debug)]
152struct ListCustomVocabularyItemsResponseDeserializer;
153impl ::aws_smithy_runtime_api::client::ser_de::DeserializeResponse for ListCustomVocabularyItemsResponseDeserializer {
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_custom_vocabulary_items::de_list_custom_vocabulary_items_http_error(status, headers, body)
166        } else {
167            crate::protocol_serde::shape_list_custom_vocabulary_items::de_list_custom_vocabulary_items_http_response(status, headers, body)
168        };
169        crate::protocol_serde::type_erase_result(parse_result)
170    }
171}
172#[derive(Debug)]
173struct ListCustomVocabularyItemsRequestSerializer;
174impl ::aws_smithy_runtime_api::client::ser_de::SerializeRequest for ListCustomVocabularyItemsRequestSerializer {
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_custom_vocabulary_items::ListCustomVocabularyItemsInput>()
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            fn uri_base(
190                _input: &crate::operation::list_custom_vocabulary_items::ListCustomVocabularyItemsInput,
191                output: &mut ::std::string::String,
192            ) -> ::std::result::Result<(), ::aws_smithy_types::error::operation::BuildError> {
193                use ::std::fmt::Write as _;
194                let input_1 = &_input.bot_id;
195                let input_1 = input_1
196                    .as_ref()
197                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("bot_id", "cannot be empty or unset"))?;
198                let bot_id = ::aws_smithy_http::label::fmt_string(input_1, ::aws_smithy_http::label::EncodingStrategy::Default);
199                if bot_id.is_empty() {
200                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
201                        "bot_id",
202                        "cannot be empty or unset",
203                    ));
204                }
205                let input_2 = &_input.bot_version;
206                let input_2 = input_2
207                    .as_ref()
208                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("bot_version", "cannot be empty or unset"))?;
209                let bot_version = ::aws_smithy_http::label::fmt_string(input_2, ::aws_smithy_http::label::EncodingStrategy::Default);
210                if bot_version.is_empty() {
211                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
212                        "bot_version",
213                        "cannot be empty or unset",
214                    ));
215                }
216                let input_3 = &_input.locale_id;
217                let input_3 = input_3
218                    .as_ref()
219                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("locale_id", "cannot be empty or unset"))?;
220                let locale_id = ::aws_smithy_http::label::fmt_string(input_3, ::aws_smithy_http::label::EncodingStrategy::Default);
221                if locale_id.is_empty() {
222                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
223                        "locale_id",
224                        "cannot be empty or unset",
225                    ));
226                }
227                ::std::write!(
228                    output,
229                    "/bots/{botId}/botversions/{botVersion}/botlocales/{localeId}/customvocabulary/DEFAULT/list",
230                    botId = bot_id,
231                    botVersion = bot_version,
232                    localeId = locale_id
233                )
234                .expect("formatting should succeed");
235                ::std::result::Result::Ok(())
236            }
237            #[allow(clippy::unnecessary_wraps)]
238            fn update_http_builder(
239                input: &crate::operation::list_custom_vocabulary_items::ListCustomVocabularyItemsInput,
240                builder: ::http::request::Builder,
241            ) -> ::std::result::Result<::http::request::Builder, ::aws_smithy_types::error::operation::BuildError> {
242                let mut uri = ::std::string::String::new();
243                uri_base(input, &mut uri)?;
244                ::std::result::Result::Ok(builder.method("POST").uri(uri))
245            }
246            let mut builder = update_http_builder(&input, ::http::request::Builder::new())?;
247            builder = _header_serialization_settings.set_default_header(builder, ::http::header::CONTENT_TYPE, "application/json");
248            builder
249        };
250        let body = ::aws_smithy_types::body::SdkBody::from(
251            crate::protocol_serde::shape_list_custom_vocabulary_items::ser_list_custom_vocabulary_items_input(&input)?,
252        );
253        if let Some(content_length) = body.content_length() {
254            let content_length = content_length.to_string();
255            request_builder = _header_serialization_settings.set_default_header(request_builder, ::http::header::CONTENT_LENGTH, &content_length);
256        }
257        ::std::result::Result::Ok(request_builder.body(body).expect("valid request").try_into().unwrap())
258    }
259}
260#[derive(Debug)]
261struct ListCustomVocabularyItemsEndpointParamsInterceptor;
262
263impl ::aws_smithy_runtime_api::client::interceptors::Intercept for ListCustomVocabularyItemsEndpointParamsInterceptor {
264    fn name(&self) -> &'static str {
265        "ListCustomVocabularyItemsEndpointParamsInterceptor"
266    }
267
268    fn read_before_execution(
269        &self,
270        context: &::aws_smithy_runtime_api::client::interceptors::context::BeforeSerializationInterceptorContextRef<
271            '_,
272            ::aws_smithy_runtime_api::client::interceptors::context::Input,
273            ::aws_smithy_runtime_api::client::interceptors::context::Output,
274            ::aws_smithy_runtime_api::client::interceptors::context::Error,
275        >,
276        cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
277    ) -> ::std::result::Result<(), ::aws_smithy_runtime_api::box_error::BoxError> {
278        let _input = context
279            .input()
280            .downcast_ref::<ListCustomVocabularyItemsInput>()
281            .ok_or("failed to downcast to ListCustomVocabularyItemsInput")?;
282
283        let params = crate::config::endpoint::Params::builder()
284            .set_region(cfg.load::<::aws_types::region::Region>().map(|r| r.as_ref().to_owned()))
285            .set_use_dual_stack(cfg.load::<::aws_types::endpoint_config::UseDualStack>().map(|ty| ty.0))
286            .set_use_fips(cfg.load::<::aws_types::endpoint_config::UseFips>().map(|ty| ty.0))
287            .set_endpoint(cfg.load::<::aws_types::endpoint_config::EndpointUrl>().map(|ty| ty.0.clone()))
288            .build()
289            .map_err(|err| {
290                ::aws_smithy_runtime_api::client::interceptors::error::ContextAttachedError::new("endpoint params could not be built", err)
291            })?;
292        cfg.interceptor_state()
293            .store_put(::aws_smithy_runtime_api::client::endpoint::EndpointResolverParams::new(params));
294        ::std::result::Result::Ok(())
295    }
296}
297
298// The get_* functions below are generated from JMESPath expressions in the
299// operationContextParams trait. They target the operation's input shape.
300
301/// Error type for the `ListCustomVocabularyItemsError` operation.
302#[non_exhaustive]
303#[derive(::std::fmt::Debug)]
304pub enum ListCustomVocabularyItemsError {
305    /// <p>The service encountered an unexpected condition. Try your request again.</p>
306    InternalServerException(crate::types::error::InternalServerException),
307    /// <p>You asked to describe a resource that doesn't exist. Check the resource that you are requesting and try again.</p>
308    ResourceNotFoundException(crate::types::error::ResourceNotFoundException),
309    /// <p>You have reached a quota for your bot.</p>
310    ServiceQuotaExceededException(crate::types::error::ServiceQuotaExceededException),
311    /// <p>Your request rate is too high. Reduce the frequency of requests.</p>
312    ThrottlingException(crate::types::error::ThrottlingException),
313    /// <p>One of the input parameters in your request isn't valid. Check the parameters and try your request again.</p>
314    ValidationException(crate::types::error::ValidationException),
315    /// An unexpected error occurred (e.g., invalid JSON returned by the service or an unknown error code).
316    #[deprecated(note = "Matching `Unhandled` directly is not forwards compatible. Instead, match using a \
317    variable wildcard pattern and check `.code()`:
318     \
319    &nbsp;&nbsp;&nbsp;`err if err.code() == Some(\"SpecificExceptionCode\") => { /* handle the error */ }`
320     \
321    See [`ProvideErrorMetadata`](#impl-ProvideErrorMetadata-for-ListCustomVocabularyItemsError) for what information is available for the error.")]
322    Unhandled(crate::error::sealed_unhandled::Unhandled),
323}
324impl ListCustomVocabularyItemsError {
325    /// Creates the `ListCustomVocabularyItemsError::Unhandled` variant from any error type.
326    pub fn unhandled(
327        err: impl ::std::convert::Into<::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>>,
328    ) -> Self {
329        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
330            source: err.into(),
331            meta: ::std::default::Default::default(),
332        })
333    }
334
335    /// Creates the `ListCustomVocabularyItemsError::Unhandled` variant from an [`ErrorMetadata`](::aws_smithy_types::error::ErrorMetadata).
336    pub fn generic(err: ::aws_smithy_types::error::ErrorMetadata) -> Self {
337        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
338            source: err.clone().into(),
339            meta: err,
340        })
341    }
342    ///
343    /// Returns error metadata, which includes the error code, message,
344    /// request ID, and potentially additional information.
345    ///
346    pub fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
347        match self {
348            Self::InternalServerException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
349            Self::ResourceNotFoundException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
350            Self::ServiceQuotaExceededException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
351            Self::ThrottlingException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
352            Self::ValidationException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
353            Self::Unhandled(e) => &e.meta,
354        }
355    }
356    /// Returns `true` if the error kind is `ListCustomVocabularyItemsError::InternalServerException`.
357    pub fn is_internal_server_exception(&self) -> bool {
358        matches!(self, Self::InternalServerException(_))
359    }
360    /// Returns `true` if the error kind is `ListCustomVocabularyItemsError::ResourceNotFoundException`.
361    pub fn is_resource_not_found_exception(&self) -> bool {
362        matches!(self, Self::ResourceNotFoundException(_))
363    }
364    /// Returns `true` if the error kind is `ListCustomVocabularyItemsError::ServiceQuotaExceededException`.
365    pub fn is_service_quota_exceeded_exception(&self) -> bool {
366        matches!(self, Self::ServiceQuotaExceededException(_))
367    }
368    /// Returns `true` if the error kind is `ListCustomVocabularyItemsError::ThrottlingException`.
369    pub fn is_throttling_exception(&self) -> bool {
370        matches!(self, Self::ThrottlingException(_))
371    }
372    /// Returns `true` if the error kind is `ListCustomVocabularyItemsError::ValidationException`.
373    pub fn is_validation_exception(&self) -> bool {
374        matches!(self, Self::ValidationException(_))
375    }
376}
377impl ::std::error::Error for ListCustomVocabularyItemsError {
378    fn source(&self) -> ::std::option::Option<&(dyn ::std::error::Error + 'static)> {
379        match self {
380            Self::InternalServerException(_inner) => ::std::option::Option::Some(_inner),
381            Self::ResourceNotFoundException(_inner) => ::std::option::Option::Some(_inner),
382            Self::ServiceQuotaExceededException(_inner) => ::std::option::Option::Some(_inner),
383            Self::ThrottlingException(_inner) => ::std::option::Option::Some(_inner),
384            Self::ValidationException(_inner) => ::std::option::Option::Some(_inner),
385            Self::Unhandled(_inner) => ::std::option::Option::Some(&*_inner.source),
386        }
387    }
388}
389impl ::std::fmt::Display for ListCustomVocabularyItemsError {
390    fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
391        match self {
392            Self::InternalServerException(_inner) => _inner.fmt(f),
393            Self::ResourceNotFoundException(_inner) => _inner.fmt(f),
394            Self::ServiceQuotaExceededException(_inner) => _inner.fmt(f),
395            Self::ThrottlingException(_inner) => _inner.fmt(f),
396            Self::ValidationException(_inner) => _inner.fmt(f),
397            Self::Unhandled(_inner) => {
398                if let ::std::option::Option::Some(code) = ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self) {
399                    write!(f, "unhandled error ({code})")
400                } else {
401                    f.write_str("unhandled error")
402                }
403            }
404        }
405    }
406}
407impl ::aws_smithy_types::retry::ProvideErrorKind for ListCustomVocabularyItemsError {
408    fn code(&self) -> ::std::option::Option<&str> {
409        ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self)
410    }
411    fn retryable_error_kind(&self) -> ::std::option::Option<::aws_smithy_types::retry::ErrorKind> {
412        ::std::option::Option::None
413    }
414}
415impl ::aws_smithy_types::error::metadata::ProvideErrorMetadata for ListCustomVocabularyItemsError {
416    fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
417        match self {
418            Self::InternalServerException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
419            Self::ResourceNotFoundException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
420            Self::ServiceQuotaExceededException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
421            Self::ThrottlingException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
422            Self::ValidationException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
423            Self::Unhandled(_inner) => &_inner.meta,
424        }
425    }
426}
427impl ::aws_smithy_runtime_api::client::result::CreateUnhandledError for ListCustomVocabularyItemsError {
428    fn create_unhandled_error(
429        source: ::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>,
430        meta: ::std::option::Option<::aws_smithy_types::error::ErrorMetadata>,
431    ) -> Self {
432        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
433            source,
434            meta: meta.unwrap_or_default(),
435        })
436    }
437}
438impl ::aws_types::request_id::RequestId for crate::operation::list_custom_vocabulary_items::ListCustomVocabularyItemsError {
439    fn request_id(&self) -> Option<&str> {
440        self.meta().request_id()
441    }
442}
443
444pub use crate::operation::list_custom_vocabulary_items::_list_custom_vocabulary_items_output::ListCustomVocabularyItemsOutput;
445
446pub use crate::operation::list_custom_vocabulary_items::_list_custom_vocabulary_items_input::ListCustomVocabularyItemsInput;
447
448mod _list_custom_vocabulary_items_input;
449
450mod _list_custom_vocabulary_items_output;
451
452/// Builders
453pub mod builders;
454
455/// Paginator for this operation
456pub mod paginator;