# MapStateStartedEventDetails
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Details about a Map state that was started.

## Contents
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 ** length **   <a name="StepFunctions-Type-MapStateStartedEventDetails-length"></a>
The size of the array for Map state iterations.  
Type: Integer  
Valid Range: Minimum value of 0.  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/states-2016-11-23/MapStateStartedEventDetails) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/MapStateStartedEventDetails) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/states-2016-11-23/MapStateStartedEventDetails)