aws_sdk_iotwireless/operation/
disassociate_wireless_device_from_multicast_group.rs

1// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
2/// Orchestration and serialization glue logic for `DisassociateWirelessDeviceFromMulticastGroup`.
3#[derive(::std::clone::Clone, ::std::default::Default, ::std::fmt::Debug)]
4#[non_exhaustive]
5pub struct DisassociateWirelessDeviceFromMulticastGroup;
6impl DisassociateWirelessDeviceFromMulticastGroup {
7    /// Creates a new `DisassociateWirelessDeviceFromMulticastGroup`
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::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupInput,
14    ) -> ::std::result::Result<
15        crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupOutput,
16        ::aws_smithy_runtime_api::client::result::SdkError<
17            crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupError,
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::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupError>().expect("correct error type")
27                            })
28        };
29        let context = Self::orchestrate_with_stop_point(runtime_plugins, input, ::aws_smithy_runtime::client::orchestrator::StopPoint::None)
30            .await
31            .map_err(map_err)?;
32        let output = context.finalize().map_err(map_err)?;
33        ::std::result::Result::Ok(
34            output
35                .downcast::<crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupOutput>()
36                .expect("correct output type"),
37        )
38    }
39
40    pub(crate) async fn orchestrate_with_stop_point(
41        runtime_plugins: &::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
42        input: crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupInput,
43        stop_point: ::aws_smithy_runtime::client::orchestrator::StopPoint,
44    ) -> ::std::result::Result<
45        ::aws_smithy_runtime_api::client::interceptors::context::InterceptorContext,
46        ::aws_smithy_runtime_api::client::result::SdkError<
47            ::aws_smithy_runtime_api::client::interceptors::context::Error,
48            ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
49        >,
50    > {
51        let input = ::aws_smithy_runtime_api::client::interceptors::context::Input::erase(input);
52        ::aws_smithy_runtime::client::orchestrator::invoke_with_stop_point(
53            "iotwireless",
54            "DisassociateWirelessDeviceFromMulticastGroup",
55            input,
56            runtime_plugins,
57            stop_point,
58        )
59        .await
60    }
61
62    pub(crate) fn operation_runtime_plugins(
63        client_runtime_plugins: ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
64        client_config: &crate::config::Config,
65        config_override: ::std::option::Option<crate::config::Builder>,
66    ) -> ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins {
67        let mut runtime_plugins = client_runtime_plugins.with_operation_plugin(Self::new());
68        runtime_plugins = runtime_plugins.with_client_plugin(crate::auth_plugin::DefaultAuthOptionsPlugin::new(vec![
69            ::aws_runtime::auth::sigv4::SCHEME_ID,
70        ]));
71        if let ::std::option::Option::Some(config_override) = config_override {
72            for plugin in config_override.runtime_plugins.iter().cloned() {
73                runtime_plugins = runtime_plugins.with_operation_plugin(plugin);
74            }
75            runtime_plugins = runtime_plugins.with_operation_plugin(crate::config::ConfigOverrideRuntimePlugin::new(
76                config_override,
77                client_config.config.clone(),
78                &client_config.runtime_components,
79            ));
80        }
81        runtime_plugins
82    }
83}
84impl ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugin for DisassociateWirelessDeviceFromMulticastGroup {
85    fn config(&self) -> ::std::option::Option<::aws_smithy_types::config_bag::FrozenLayer> {
86        let mut cfg = ::aws_smithy_types::config_bag::Layer::new("DisassociateWirelessDeviceFromMulticastGroup");
87
88        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedRequestSerializer::new(
89            DisassociateWirelessDeviceFromMulticastGroupRequestSerializer,
90        ));
91        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedResponseDeserializer::new(
92            DisassociateWirelessDeviceFromMulticastGroupResponseDeserializer,
93        ));
94
95        cfg.store_put(::aws_smithy_runtime_api::client::auth::AuthSchemeOptionResolverParams::new(
96            ::aws_smithy_runtime_api::client::auth::static_resolver::StaticAuthSchemeOptionResolverParams::new(),
97        ));
98
99        cfg.store_put(::aws_smithy_runtime_api::client::orchestrator::Metadata::new(
100            "DisassociateWirelessDeviceFromMulticastGroup",
101            "iotwireless",
102        ));
103        let mut signing_options = ::aws_runtime::auth::SigningOptions::default();
104        signing_options.double_uri_encode = true;
105        signing_options.content_sha256_header = false;
106        signing_options.normalize_uri_path = true;
107        signing_options.payload_override = None;
108
109        cfg.store_put(::aws_runtime::auth::SigV4OperationSigningConfig {
110            signing_options,
111            ..::std::default::Default::default()
112        });
113
114        ::std::option::Option::Some(cfg.freeze())
115    }
116
117    fn runtime_components(
118        &self,
119        _: &::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder,
120    ) -> ::std::borrow::Cow<'_, ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder> {
121        #[allow(unused_mut)]
122        let mut rcb =
123            ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder::new("DisassociateWirelessDeviceFromMulticastGroup")
124                .with_interceptor(::aws_smithy_runtime::client::stalled_stream_protection::StalledStreamProtectionInterceptor::default())
125                .with_interceptor(DisassociateWirelessDeviceFromMulticastGroupEndpointParamsInterceptor)
126                .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::TransientErrorClassifier::<
127                    crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupError,
128                >::new())
129                .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::ModeledAsRetryableClassifier::<
130                    crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupError,
131                >::new())
132                .with_retry_classifier(::aws_runtime::retries::classifiers::AwsErrorCodeClassifier::<
133                    crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupError,
134                >::new());
135
136        ::std::borrow::Cow::Owned(rcb)
137    }
138}
139
140#[derive(Debug)]
141struct DisassociateWirelessDeviceFromMulticastGroupResponseDeserializer;
142impl ::aws_smithy_runtime_api::client::ser_de::DeserializeResponse for DisassociateWirelessDeviceFromMulticastGroupResponseDeserializer {
143    fn deserialize_nonstreaming(
144        &self,
145        response: &::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
146    ) -> ::aws_smithy_runtime_api::client::interceptors::context::OutputOrError {
147        let (success, status) = (response.status().is_success(), response.status().as_u16());
148        let headers = response.headers();
149        let body = response.body().bytes().expect("body loaded");
150        #[allow(unused_mut)]
151        let mut force_error = false;
152        ::tracing::debug!(request_id = ?::aws_types::request_id::RequestId::request_id(response));
153        let parse_result = if !success && status != 204 || force_error {
154            crate::protocol_serde::shape_disassociate_wireless_device_from_multicast_group::de_disassociate_wireless_device_from_multicast_group_http_error(status, headers, body)
155        } else {
156            crate::protocol_serde::shape_disassociate_wireless_device_from_multicast_group::de_disassociate_wireless_device_from_multicast_group_http_response(status, headers, body)
157        };
158        crate::protocol_serde::type_erase_result(parse_result)
159    }
160}
161#[derive(Debug)]
162struct DisassociateWirelessDeviceFromMulticastGroupRequestSerializer;
163impl ::aws_smithy_runtime_api::client::ser_de::SerializeRequest for DisassociateWirelessDeviceFromMulticastGroupRequestSerializer {
164    #[allow(unused_mut, clippy::let_and_return, clippy::needless_borrow, clippy::useless_conversion)]
165    fn serialize_input(
166        &self,
167        input: ::aws_smithy_runtime_api::client::interceptors::context::Input,
168        _cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
169    ) -> ::std::result::Result<::aws_smithy_runtime_api::client::orchestrator::HttpRequest, ::aws_smithy_runtime_api::box_error::BoxError> {
170        let input = input
171            .downcast::<crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupInput>()
172            .expect("correct type");
173        let _header_serialization_settings = _cfg
174            .load::<crate::serialization_settings::HeaderSerializationSettings>()
175            .cloned()
176            .unwrap_or_default();
177        let mut request_builder = {
178            fn uri_base(
179                _input: &crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupInput,
180                output: &mut ::std::string::String,
181            ) -> ::std::result::Result<(), ::aws_smithy_types::error::operation::BuildError> {
182                use ::std::fmt::Write as _;
183                let input_1 = &_input.id;
184                let input_1 = input_1
185                    .as_ref()
186                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("id", "cannot be empty or unset"))?;
187                let id = ::aws_smithy_http::label::fmt_string(input_1, ::aws_smithy_http::label::EncodingStrategy::Default);
188                if id.is_empty() {
189                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
190                        "id",
191                        "cannot be empty or unset",
192                    ));
193                }
194                let input_2 = &_input.wireless_device_id;
195                let input_2 = input_2.as_ref().ok_or_else(|| {
196                    ::aws_smithy_types::error::operation::BuildError::missing_field("wireless_device_id", "cannot be empty or unset")
197                })?;
198                let wireless_device_id = ::aws_smithy_http::label::fmt_string(input_2, ::aws_smithy_http::label::EncodingStrategy::Default);
199                if wireless_device_id.is_empty() {
200                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
201                        "wireless_device_id",
202                        "cannot be empty or unset",
203                    ));
204                }
205                ::std::write!(
206                    output,
207                    "/multicast-groups/{Id}/wireless-devices/{WirelessDeviceId}",
208                    Id = id,
209                    WirelessDeviceId = wireless_device_id
210                )
211                .expect("formatting should succeed");
212                ::std::result::Result::Ok(())
213            }
214            #[allow(clippy::unnecessary_wraps)]
215            fn update_http_builder(
216                input: &crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupInput,
217                builder: ::http::request::Builder,
218            ) -> ::std::result::Result<::http::request::Builder, ::aws_smithy_types::error::operation::BuildError> {
219                let mut uri = ::std::string::String::new();
220                uri_base(input, &mut uri)?;
221                ::std::result::Result::Ok(builder.method("DELETE").uri(uri))
222            }
223            let mut builder = update_http_builder(&input, ::http::request::Builder::new())?;
224            builder
225        };
226        let body = ::aws_smithy_types::body::SdkBody::from("");
227
228        ::std::result::Result::Ok(request_builder.body(body).expect("valid request").try_into().unwrap())
229    }
230}
231#[derive(Debug)]
232struct DisassociateWirelessDeviceFromMulticastGroupEndpointParamsInterceptor;
233
234impl ::aws_smithy_runtime_api::client::interceptors::Intercept for DisassociateWirelessDeviceFromMulticastGroupEndpointParamsInterceptor {
235    fn name(&self) -> &'static str {
236        "DisassociateWirelessDeviceFromMulticastGroupEndpointParamsInterceptor"
237    }
238
239    fn read_before_execution(
240        &self,
241        context: &::aws_smithy_runtime_api::client::interceptors::context::BeforeSerializationInterceptorContextRef<
242            '_,
243            ::aws_smithy_runtime_api::client::interceptors::context::Input,
244            ::aws_smithy_runtime_api::client::interceptors::context::Output,
245            ::aws_smithy_runtime_api::client::interceptors::context::Error,
246        >,
247        cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
248    ) -> ::std::result::Result<(), ::aws_smithy_runtime_api::box_error::BoxError> {
249        let _input = context
250            .input()
251            .downcast_ref::<DisassociateWirelessDeviceFromMulticastGroupInput>()
252            .ok_or("failed to downcast to DisassociateWirelessDeviceFromMulticastGroupInput")?;
253
254        let params = crate::config::endpoint::Params::builder()
255            .set_region(cfg.load::<::aws_types::region::Region>().map(|r| r.as_ref().to_owned()))
256            .set_use_dual_stack(cfg.load::<::aws_types::endpoint_config::UseDualStack>().map(|ty| ty.0))
257            .set_use_fips(cfg.load::<::aws_types::endpoint_config::UseFips>().map(|ty| ty.0))
258            .set_endpoint(cfg.load::<::aws_types::endpoint_config::EndpointUrl>().map(|ty| ty.0.clone()))
259            .build()
260            .map_err(|err| {
261                ::aws_smithy_runtime_api::client::interceptors::error::ContextAttachedError::new("endpoint params could not be built", err)
262            })?;
263        cfg.interceptor_state()
264            .store_put(::aws_smithy_runtime_api::client::endpoint::EndpointResolverParams::new(params));
265        ::std::result::Result::Ok(())
266    }
267}
268
269// The get_* functions below are generated from JMESPath expressions in the
270// operationContextParams trait. They target the operation's input shape.
271
272/// Error type for the `DisassociateWirelessDeviceFromMulticastGroupError` operation.
273#[non_exhaustive]
274#[derive(::std::fmt::Debug)]
275pub enum DisassociateWirelessDeviceFromMulticastGroupError {
276    /// <p>User does not have permission to perform this action.</p>
277    AccessDeniedException(crate::types::error::AccessDeniedException),
278    /// <p>An unexpected error occurred while processing a request.</p>
279    InternalServerException(crate::types::error::InternalServerException),
280    /// <p>Resource does not exist.</p>
281    ResourceNotFoundException(crate::types::error::ResourceNotFoundException),
282    /// <p>The request was denied because it exceeded the allowed API request rate.</p>
283    ThrottlingException(crate::types::error::ThrottlingException),
284    /// <p>The input did not meet the specified constraints.</p>
285    ValidationException(crate::types::error::ValidationException),
286    /// An unexpected error occurred (e.g., invalid JSON returned by the service or an unknown error code).
287    #[deprecated(note = "Matching `Unhandled` directly is not forwards compatible. Instead, match using a \
288    variable wildcard pattern and check `.code()`:
289     \
290    &nbsp;&nbsp;&nbsp;`err if err.code() == Some(\"SpecificExceptionCode\") => { /* handle the error */ }`
291     \
292    See [`ProvideErrorMetadata`](#impl-ProvideErrorMetadata-for-DisassociateWirelessDeviceFromMulticastGroupError) for what information is available for the error.")]
293    Unhandled(crate::error::sealed_unhandled::Unhandled),
294}
295impl DisassociateWirelessDeviceFromMulticastGroupError {
296    /// Creates the `DisassociateWirelessDeviceFromMulticastGroupError::Unhandled` variant from any error type.
297    pub fn unhandled(
298        err: impl ::std::convert::Into<::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>>,
299    ) -> Self {
300        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
301            source: err.into(),
302            meta: ::std::default::Default::default(),
303        })
304    }
305
306    /// Creates the `DisassociateWirelessDeviceFromMulticastGroupError::Unhandled` variant from an [`ErrorMetadata`](::aws_smithy_types::error::ErrorMetadata).
307    pub fn generic(err: ::aws_smithy_types::error::ErrorMetadata) -> Self {
308        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
309            source: err.clone().into(),
310            meta: err,
311        })
312    }
313    ///
314    /// Returns error metadata, which includes the error code, message,
315    /// request ID, and potentially additional information.
316    ///
317    pub fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
318        match self {
319            Self::AccessDeniedException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
320            Self::InternalServerException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
321            Self::ResourceNotFoundException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
322            Self::ThrottlingException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
323            Self::ValidationException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
324            Self::Unhandled(e) => &e.meta,
325        }
326    }
327    /// Returns `true` if the error kind is `DisassociateWirelessDeviceFromMulticastGroupError::AccessDeniedException`.
328    pub fn is_access_denied_exception(&self) -> bool {
329        matches!(self, Self::AccessDeniedException(_))
330    }
331    /// Returns `true` if the error kind is `DisassociateWirelessDeviceFromMulticastGroupError::InternalServerException`.
332    pub fn is_internal_server_exception(&self) -> bool {
333        matches!(self, Self::InternalServerException(_))
334    }
335    /// Returns `true` if the error kind is `DisassociateWirelessDeviceFromMulticastGroupError::ResourceNotFoundException`.
336    pub fn is_resource_not_found_exception(&self) -> bool {
337        matches!(self, Self::ResourceNotFoundException(_))
338    }
339    /// Returns `true` if the error kind is `DisassociateWirelessDeviceFromMulticastGroupError::ThrottlingException`.
340    pub fn is_throttling_exception(&self) -> bool {
341        matches!(self, Self::ThrottlingException(_))
342    }
343    /// Returns `true` if the error kind is `DisassociateWirelessDeviceFromMulticastGroupError::ValidationException`.
344    pub fn is_validation_exception(&self) -> bool {
345        matches!(self, Self::ValidationException(_))
346    }
347}
348impl ::std::error::Error for DisassociateWirelessDeviceFromMulticastGroupError {
349    fn source(&self) -> ::std::option::Option<&(dyn ::std::error::Error + 'static)> {
350        match self {
351            Self::AccessDeniedException(_inner) => ::std::option::Option::Some(_inner),
352            Self::InternalServerException(_inner) => ::std::option::Option::Some(_inner),
353            Self::ResourceNotFoundException(_inner) => ::std::option::Option::Some(_inner),
354            Self::ThrottlingException(_inner) => ::std::option::Option::Some(_inner),
355            Self::ValidationException(_inner) => ::std::option::Option::Some(_inner),
356            Self::Unhandled(_inner) => ::std::option::Option::Some(&*_inner.source),
357        }
358    }
359}
360impl ::std::fmt::Display for DisassociateWirelessDeviceFromMulticastGroupError {
361    fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
362        match self {
363            Self::AccessDeniedException(_inner) => _inner.fmt(f),
364            Self::InternalServerException(_inner) => _inner.fmt(f),
365            Self::ResourceNotFoundException(_inner) => _inner.fmt(f),
366            Self::ThrottlingException(_inner) => _inner.fmt(f),
367            Self::ValidationException(_inner) => _inner.fmt(f),
368            Self::Unhandled(_inner) => {
369                if let ::std::option::Option::Some(code) = ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self) {
370                    write!(f, "unhandled error ({code})")
371                } else {
372                    f.write_str("unhandled error")
373                }
374            }
375        }
376    }
377}
378impl ::aws_smithy_types::retry::ProvideErrorKind for DisassociateWirelessDeviceFromMulticastGroupError {
379    fn code(&self) -> ::std::option::Option<&str> {
380        ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self)
381    }
382    fn retryable_error_kind(&self) -> ::std::option::Option<::aws_smithy_types::retry::ErrorKind> {
383        ::std::option::Option::None
384    }
385}
386impl ::aws_smithy_types::error::metadata::ProvideErrorMetadata for DisassociateWirelessDeviceFromMulticastGroupError {
387    fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
388        match self {
389            Self::AccessDeniedException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
390            Self::InternalServerException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
391            Self::ResourceNotFoundException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
392            Self::ThrottlingException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
393            Self::ValidationException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
394            Self::Unhandled(_inner) => &_inner.meta,
395        }
396    }
397}
398impl ::aws_smithy_runtime_api::client::result::CreateUnhandledError for DisassociateWirelessDeviceFromMulticastGroupError {
399    fn create_unhandled_error(
400        source: ::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>,
401        meta: ::std::option::Option<::aws_smithy_types::error::ErrorMetadata>,
402    ) -> Self {
403        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
404            source,
405            meta: meta.unwrap_or_default(),
406        })
407    }
408}
409impl ::aws_types::request_id::RequestId
410    for crate::operation::disassociate_wireless_device_from_multicast_group::DisassociateWirelessDeviceFromMulticastGroupError
411{
412    fn request_id(&self) -> Option<&str> {
413        self.meta().request_id()
414    }
415}
416
417pub use crate::operation::disassociate_wireless_device_from_multicast_group::_disassociate_wireless_device_from_multicast_group_output::DisassociateWirelessDeviceFromMulticastGroupOutput;
418
419pub use crate::operation::disassociate_wireless_device_from_multicast_group::_disassociate_wireless_device_from_multicast_group_input::DisassociateWirelessDeviceFromMulticastGroupInput;
420
421mod _disassociate_wireless_device_from_multicast_group_input;
422
423mod _disassociate_wireless_device_from_multicast_group_output;
424
425/// Builders
426pub mod builders;
aws_sdk_iotwireless/operation/disassociate_wireless_device_from_multicast_group.rs

aws_sdk_iotwireless/operation/
disassociate_wireless_device_from_multicast_group.rs
