1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */

//! Types for [error](SdkError) responses.

use crate::client::connection::ConnectionMetadata;
use aws_smithy_types::error::metadata::{ProvideErrorMetadata, EMPTY_ERROR_METADATA};
use aws_smithy_types::error::operation::BuildError;
use aws_smithy_types::error::ErrorMetadata;
use aws_smithy_types::retry::ErrorKind;
use std::error::Error;
use std::fmt;
use std::fmt::{Debug, Display, Formatter};

type BoxError = Box<dyn Error + Send + Sync>;

/// Builders for `SdkError` variant context.
pub mod builders {
    use super::*;

    macro_rules! source_only_error_builder {
        ($errorName:ident, $builderName:ident, $sourceType:ident) => {
            #[doc = concat!("Builder for [`", stringify!($errorName), "`](super::", stringify!($errorName), ").")]
            #[derive(Debug, Default)]
            pub struct $builderName {
                source: Option<$sourceType>,
            }

            impl $builderName {
                #[doc = "Creates a new builder."]
                pub fn new() -> Self { Default::default() }

                #[doc = "Sets the error source."]
                pub fn source(mut self, source: impl Into<$sourceType>) -> Self {
                    self.source = Some(source.into());
                    self
                }

                #[doc = "Sets the error source."]
                pub fn set_source(&mut self, source: Option<$sourceType>) -> &mut Self {
                    self.source = source;
                    self
                }

                #[doc = "Builds the error context."]
                pub fn build(self) -> $errorName {
                    $errorName { source: self.source.expect("source is required") }
                }
            }
        };
    }

    source_only_error_builder!(ConstructionFailure, ConstructionFailureBuilder, BoxError);
    source_only_error_builder!(TimeoutError, TimeoutErrorBuilder, BoxError);
    source_only_error_builder!(DispatchFailure, DispatchFailureBuilder, ConnectorError);

    /// Builder for [`ResponseError`].
    #[derive(Debug)]
    pub struct ResponseErrorBuilder<R> {
        source: Option<BoxError>,
        raw: Option<R>,
    }

    impl<R> Default for ResponseErrorBuilder<R> {
        fn default() -> Self {
            Self {
                source: None,
                raw: None,
            }
        }
    }

    impl<R> ResponseErrorBuilder<R> {
        /// Creates a new builder.
        pub fn new() -> Self {
            Default::default()
        }

        /// Sets the error source.
        pub fn source(mut self, source: impl Into<BoxError>) -> Self {
            self.source = Some(source.into());
            self
        }

        /// Sets the error source.
        pub fn set_source(&mut self, source: Option<BoxError>) -> &mut Self {
            self.source = source;
            self
        }

        /// Sets the raw response.
        pub fn raw(mut self, raw: R) -> Self {
            self.raw = Some(raw);
            self
        }

        /// Sets the raw response.
        pub fn set_raw(&mut self, raw: Option<R>) -> &mut Self {
            self.raw = raw;
            self
        }

        /// Builds the error context.
        pub fn build(self) -> ResponseError<R> {
            ResponseError {
                source: self.source.expect("source is required"),
                raw: self.raw.expect("a raw response is required"),
            }
        }
    }

    /// Builder for [`ServiceError`].
    #[derive(Debug)]
    pub struct ServiceErrorBuilder<E, R> {
        source: Option<E>,
        raw: Option<R>,
    }

    impl<E, R> Default for ServiceErrorBuilder<E, R> {
        fn default() -> Self {
            Self {
                source: None,
                raw: None,
            }
        }
    }

    impl<E, R> ServiceErrorBuilder<E, R> {
        /// Creates a new builder.
        pub fn new() -> Self {
            Default::default()
        }

        /// Sets the error source.
        pub fn source(mut self, source: impl Into<E>) -> Self {
            self.source = Some(source.into());
            self
        }

        /// Sets the error source.
        pub fn set_source(&mut self, source: Option<E>) -> &mut Self {
            self.source = source;
            self
        }

        /// Sets the raw response.
        pub fn raw(mut self, raw: R) -> Self {
            self.raw = Some(raw);
            self
        }

        /// Sets the raw response.
        pub fn set_raw(&mut self, raw: Option<R>) -> &mut Self {
            self.raw = raw;
            self
        }

        /// Builds the error context.
        pub fn build(self) -> ServiceError<E, R> {
            ServiceError {
                source: self.source.expect("source is required"),
                raw: self.raw.expect("a raw response is required"),
            }
        }
    }
}

/// Error context for [`SdkError::ConstructionFailure`]
#[derive(Debug)]
pub struct ConstructionFailure {
    pub(crate) source: BoxError,
}

impl ConstructionFailure {
    /// Creates a builder for this error context type.
    pub fn builder() -> builders::ConstructionFailureBuilder {
        builders::ConstructionFailureBuilder::new()
    }
}

/// Error context for [`SdkError::TimeoutError`]
#[derive(Debug)]
pub struct TimeoutError {
    source: BoxError,
}

impl TimeoutError {
    /// Creates a builder for this error context type.
    pub fn builder() -> builders::TimeoutErrorBuilder {
        builders::TimeoutErrorBuilder::new()
    }
}

/// Error context for [`SdkError::DispatchFailure`]
#[derive(Debug)]
pub struct DispatchFailure {
    source: ConnectorError,
}

impl DispatchFailure {
    /// Creates a builder for this error context type.
    pub fn builder() -> builders::DispatchFailureBuilder {
        builders::DispatchFailureBuilder::new()
    }

    /// Returns true if the error is an IO error
    pub fn is_io(&self) -> bool {
        self.source.is_io()
    }

    /// Returns true if the error is an timeout error
    pub fn is_timeout(&self) -> bool {
        self.source.is_timeout()
    }

    /// Returns true if the error is a user-caused error (e.g., invalid HTTP request)
    pub fn is_user(&self) -> bool {
        self.source.is_user()
    }

    /// Returns true if the error is an unclassified error.
    pub fn is_other(&self) -> bool {
        self.source.is_other()
    }

    /// Returns the optional error kind associated with an unclassified error
    pub fn as_other(&self) -> Option<ErrorKind> {
        self.source.as_other()
    }

    /// Returns the inner error if it is a connector error
    pub fn as_connector_error(&self) -> Option<&ConnectorError> {
        Some(&self.source)
    }
}

/// Error context for [`SdkError::ResponseError`]
#[derive(Debug)]
pub struct ResponseError<R> {
    /// Error encountered while parsing the response
    source: BoxError,
    /// Raw response that was available
    raw: R,
}

impl<R> ResponseError<R> {
    /// Creates a builder for this error context type.
    pub fn builder() -> builders::ResponseErrorBuilder<R> {
        builders::ResponseErrorBuilder::new()
    }

    /// Returns a reference to the raw response
    pub fn raw(&self) -> &R {
        &self.raw
    }

    /// Converts this error context into the raw response
    pub fn into_raw(self) -> R {
        self.raw
    }
}

/// Error context for [`SdkError::ServiceError`]
#[derive(Debug)]
pub struct ServiceError<E, R> {
    /// Modeled service error
    source: E,
    /// Raw response from the service
    raw: R,
}

impl<E, R> ServiceError<E, R> {
    /// Creates a builder for this error context type.
    pub fn builder() -> builders::ServiceErrorBuilder<E, R> {
        builders::ServiceErrorBuilder::new()
    }

    /// Returns the underlying error of type `E`
    pub fn err(&self) -> &E {
        &self.source
    }

    /// Converts this error context into the underlying error `E`
    pub fn into_err(self) -> E {
        self.source
    }

    /// Returns a reference to the raw response
    pub fn raw(&self) -> &R {
        &self.raw
    }

    /// Converts this error context into the raw response
    pub fn into_raw(self) -> R {
        self.raw
    }
}

/// Constructs the unhandled variant of a code generated error.
///
/// This trait exists so that [`SdkError::into_service_error`] can be infallible.
pub trait CreateUnhandledError {
    /// Creates an unhandled error variant with the given `source` and error metadata.
    fn create_unhandled_error(
        source: Box<dyn Error + Send + Sync + 'static>,
        meta: Option<ErrorMetadata>,
    ) -> Self;
}

/// Failed SDK Result
///
/// When logging an error from the SDK, it is recommended that you either wrap the error in
/// [`DisplayErrorContext`](aws_smithy_types::error::display::DisplayErrorContext), use another
/// error reporter library that visits the error's cause/source chain, or call
/// [`Error::source`] for more details about the underlying cause.
#[non_exhaustive]
#[derive(Debug)]
pub enum SdkError<E, R> {
    /// The request failed during construction. It was not dispatched over the network.
    ConstructionFailure(ConstructionFailure),

    /// The request failed due to a timeout. The request MAY have been sent and received.
    TimeoutError(TimeoutError),

    /// The request failed during dispatch. An HTTP response was not received. The request MAY
    /// have been sent.
    DispatchFailure(DispatchFailure),

    /// A response was received but it was not parseable according the the protocol (for example
    /// the server hung up without sending a complete response)
    ResponseError(ResponseError<R>),

    /// An error response was received from the service
    ServiceError(ServiceError<E, R>),
}

impl<E, R> SdkError<E, R> {
    /// Construct a `SdkError` for a construction failure
    pub fn construction_failure(source: impl Into<BoxError>) -> Self {
        Self::ConstructionFailure(ConstructionFailure {
            source: source.into(),
        })
    }

    /// Construct a `SdkError` for a timeout
    pub fn timeout_error(source: impl Into<BoxError>) -> Self {
        Self::TimeoutError(TimeoutError {
            source: source.into(),
        })
    }

    /// Construct a `SdkError` for a dispatch failure with a [`ConnectorError`]
    pub fn dispatch_failure(source: ConnectorError) -> Self {
        Self::DispatchFailure(DispatchFailure { source })
    }

    /// Construct a `SdkError` for a response error
    pub fn response_error(source: impl Into<BoxError>, raw: R) -> Self {
        Self::ResponseError(ResponseError {
            source: source.into(),
            raw,
        })
    }

    /// Construct a `SdkError` for a service failure
    pub fn service_error(source: E, raw: R) -> Self {
        Self::ServiceError(ServiceError { source, raw })
    }

    /// Returns the underlying service error `E` if there is one
    ///
    /// If the `SdkError` is not a `ServiceError` (for example, the error is a network timeout),
    /// then it will be converted into an unhandled variant of `E`. This makes it easy to match
    /// on the service's error response while simultaneously bubbling up transient failures.
    /// For example, handling the `NoSuchKey` error for S3's `GetObject` operation may look as
    /// follows:
    ///
    /// ```no_run
    /// # use aws_smithy_runtime_api::client::result::{SdkError, CreateUnhandledError};
    /// # #[derive(Debug)] enum GetObjectError { NoSuchKey(()), Other(()) }
    /// # impl std::fmt::Display for GetObjectError {
    /// #     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { unimplemented!() }
    /// # }
    /// # impl std::error::Error for GetObjectError {}
    /// # impl CreateUnhandledError for GetObjectError {
    /// #     fn create_unhandled_error(
    /// #         _: Box<dyn std::error::Error + Send + Sync + 'static>,
    /// #         _: Option<aws_smithy_types::error::ErrorMetadata>,
    /// #     ) -> Self { unimplemented!() }
    /// # }
    /// # fn example() -> Result<(), GetObjectError> {
    /// # let sdk_err = SdkError::service_error(GetObjectError::NoSuchKey(()), ());
    /// match sdk_err.into_service_error() {
    ///     GetObjectError::NoSuchKey(_) => {
    ///         // handle NoSuchKey
    ///     }
    ///     err @ _ => return Err(err),
    /// }
    /// # Ok(())
    /// # }
    /// ```
    pub fn into_service_error(self) -> E
    where
        E: std::error::Error + Send + Sync + CreateUnhandledError + 'static,
        R: Debug + Send + Sync + 'static,
    {
        match self {
            Self::ServiceError(context) => context.source,
            _ => E::create_unhandled_error(self.into(), None),
        }
    }

    /// Returns a reference underlying service error `E` if there is one
    ///
    /// # Examples
    /// ```no_run
    /// # use aws_smithy_runtime_api::client::result::SdkError;
    /// # #[derive(Debug)] enum GetObjectError { NoSuchKey(()), Other(()) }
    /// # impl std::fmt::Display for GetObjectError {
    /// #     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { unimplemented!() }
    /// # }
    /// # impl std::error::Error for GetObjectError {}
    /// # impl GetObjectError {
    /// #   fn is_not_found(&self) -> bool { true }
    /// # }
    /// # fn example() -> Result<(), GetObjectError> {
    /// # let sdk_err = SdkError::service_error(GetObjectError::NoSuchKey(()), ());
    /// if sdk_err.as_service_error().map(|e|e.is_not_found()) == Some(true) {
    ///     println!("the object doesn't exist");
    ///     // return None, or handle this error specifically
    /// }
    /// // ... handle other error cases, happy path, etc.
    /// # Ok(())
    /// # }
    /// ```
    pub fn as_service_error(&self) -> Option<&E> {
        match self {
            Self::ServiceError(err) => Some(&err.source),
            _ => None,
        }
    }

    /// Converts this error into its error source.
    ///
    /// If there is no error source, then `Err(Self)` is returned.
    pub fn into_source(self) -> Result<Box<dyn Error + Send + Sync + 'static>, Self>
    where
        E: std::error::Error + Send + Sync + 'static,
    {
        match self {
            SdkError::ConstructionFailure(context) => Ok(context.source),
            SdkError::TimeoutError(context) => Ok(context.source),
            SdkError::ResponseError(context) => Ok(context.source),
            SdkError::DispatchFailure(context) => Ok(context.source.into()),
            SdkError::ServiceError(context) => Ok(context.source.into()),
        }
    }

    /// Return a reference to this error's raw response, if it contains one. Otherwise, return `None`.
    pub fn raw_response(&self) -> Option<&R> {
        match self {
            SdkError::ServiceError(inner) => Some(inner.raw()),
            SdkError::ResponseError(inner) => Some(inner.raw()),
            _ => None,
        }
    }

    /// Maps the service error type in `SdkError::ServiceError`
    pub fn map_service_error<E2>(self, map: impl FnOnce(E) -> E2) -> SdkError<E2, R> {
        match self {
            SdkError::ServiceError(context) => SdkError::<E2, R>::ServiceError(ServiceError {
                source: map(context.source),
                raw: context.raw,
            }),
            SdkError::ConstructionFailure(context) => {
                SdkError::<E2, R>::ConstructionFailure(context)
            }
            SdkError::DispatchFailure(context) => SdkError::<E2, R>::DispatchFailure(context),
            SdkError::ResponseError(context) => SdkError::<E2, R>::ResponseError(context),
            SdkError::TimeoutError(context) => SdkError::<E2, R>::TimeoutError(context),
        }
    }
}

impl<E, R> Display for SdkError<E, R> {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        match self {
            SdkError::ConstructionFailure(_) => write!(f, "failed to construct request"),
            SdkError::TimeoutError(_) => write!(f, "request has timed out"),
            SdkError::DispatchFailure(_) => write!(f, "dispatch failure"),
            SdkError::ResponseError(_) => write!(f, "response error"),
            SdkError::ServiceError(_) => write!(f, "service error"),
        }
    }
}

impl<E, R> Error for SdkError<E, R>
where
    E: Error + 'static,
    R: Debug,
{
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        match self {
            SdkError::ConstructionFailure(context) => Some(context.source.as_ref()),
            SdkError::TimeoutError(context) => Some(context.source.as_ref()),
            SdkError::ResponseError(context) => Some(context.source.as_ref()),
            SdkError::DispatchFailure(context) => Some(&context.source),
            SdkError::ServiceError(context) => Some(&context.source),
        }
    }
}

impl<E, R> From<BuildError> for SdkError<E, R> {
    fn from(value: BuildError) -> Self {
        SdkError::ConstructionFailure(ConstructionFailure::builder().source(value).build())
    }
}

impl<E, R> ProvideErrorMetadata for SdkError<E, R>
where
    E: ProvideErrorMetadata,
{
    fn meta(&self) -> &aws_smithy_types::error::ErrorMetadata {
        match self {
            SdkError::ConstructionFailure(_) => &EMPTY_ERROR_METADATA,
            SdkError::TimeoutError(_) => &EMPTY_ERROR_METADATA,
            SdkError::DispatchFailure(_) => &EMPTY_ERROR_METADATA,
            SdkError::ResponseError(_) => &EMPTY_ERROR_METADATA,
            SdkError::ServiceError(err) => err.source.meta(),
        }
    }
}

#[derive(Debug)]
enum ConnectorErrorKind {
    /// A timeout occurred while processing the request
    Timeout,

    /// A user-caused error (e.g., invalid HTTP request)
    User,

    /// Socket/IO error
    Io,

    /// An unclassified Error with an explicit error kind
    Other(Option<ErrorKind>),
}

/// Error from the underlying Connector
///
/// Connector exists to attach a `ConnectorErrorKind` to what would otherwise be an opaque `Box<dyn Error>`
/// that comes off a potentially generic or dynamic connector.
/// The attached `kind` is used to determine what retry behavior should occur (if any) based on the
/// connector error.
#[derive(Debug)]
pub struct ConnectorError {
    kind: ConnectorErrorKind,
    source: BoxError,
    connection: ConnectionStatus,
}

#[non_exhaustive]
#[derive(Debug)]
pub(crate) enum ConnectionStatus {
    /// This request was never connected to the remote
    ///
    /// This indicates the failure was during connection establishment
    NeverConnected,

    /// It is unknown whether a connection was established
    Unknown,

    /// The request connected to the remote prior to failure
    Connected(ConnectionMetadata),
}

impl Display for ConnectorError {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        match self.kind {
            ConnectorErrorKind::Timeout => write!(f, "timeout"),
            ConnectorErrorKind::User => write!(f, "user error"),
            ConnectorErrorKind::Io => write!(f, "io error"),
            ConnectorErrorKind::Other(_) => write!(f, "other"),
        }
    }
}

impl Error for ConnectorError {
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        Some(self.source.as_ref())
    }
}

impl ConnectorError {
    /// Construct a [`ConnectorError`] from an error caused by a timeout
    ///
    /// Timeout errors are typically retried on a new connection.
    pub fn timeout(source: BoxError) -> Self {
        Self {
            kind: ConnectorErrorKind::Timeout,
            source,
            connection: ConnectionStatus::Unknown,
        }
    }

    /// Include connection information along with this error
    pub fn with_connection(mut self, info: ConnectionMetadata) -> Self {
        self.connection = ConnectionStatus::Connected(info);
        self
    }

    /// Set the connection status on this error to report that a connection was never established
    pub fn never_connected(mut self) -> Self {
        self.connection = ConnectionStatus::NeverConnected;
        self
    }

    /// Construct a [`ConnectorError`] from an error caused by the user (e.g. invalid HTTP request)
    pub fn user(source: BoxError) -> Self {
        Self {
            kind: ConnectorErrorKind::User,
            source,
            connection: ConnectionStatus::Unknown,
        }
    }

    /// Construct a [`ConnectorError`] from an IO related error (e.g. socket hangup)
    pub fn io(source: BoxError) -> Self {
        Self {
            kind: ConnectorErrorKind::Io,
            source,
            connection: ConnectionStatus::Unknown,
        }
    }

    /// Construct a [`ConnectorError`] from an different unclassified error.
    ///
    /// Optionally, an explicit `Kind` may be passed.
    pub fn other(source: BoxError, kind: Option<ErrorKind>) -> Self {
        Self {
            source,
            kind: ConnectorErrorKind::Other(kind),
            connection: ConnectionStatus::Unknown,
        }
    }

    /// Returns true if the error is an IO error
    pub fn is_io(&self) -> bool {
        matches!(self.kind, ConnectorErrorKind::Io)
    }

    /// Returns true if the error is an timeout error
    pub fn is_timeout(&self) -> bool {
        matches!(self.kind, ConnectorErrorKind::Timeout)
    }

    /// Returns true if the error is a user-caused error (e.g., invalid HTTP request)
    pub fn is_user(&self) -> bool {
        matches!(self.kind, ConnectorErrorKind::User)
    }

    /// Returns true if the error is an unclassified error.
    pub fn is_other(&self) -> bool {
        matches!(self.kind, ConnectorErrorKind::Other(..))
    }

    /// Returns the optional error kind associated with an unclassified error
    pub fn as_other(&self) -> Option<ErrorKind> {
        match &self.kind {
            ConnectorErrorKind::Other(ek) => *ek,
            _ => None,
        }
    }

    /// Grants ownership of this error's source.
    pub fn into_source(self) -> BoxError {
        self.source
    }

    /// Returns metadata about the connection
    ///
    /// If a connection was established and provided by the internal connector, a connection will
    /// be returned.
    pub fn connection_metadata(&self) -> Option<&ConnectionMetadata> {
        match &self.connection {
            ConnectionStatus::NeverConnected => None,
            ConnectionStatus::Unknown => None,
            ConnectionStatus::Connected(conn) => Some(conn),
        }
    }
}