def get_event_source_mapping(UUID=None):
    """
    Returns configuration information for the specified event source mapping (see  CreateEventSourceMapping ).
    This operation requires permission for the lambda:GetEventSourceMapping action.
    See also: AWS API Documentation
    
    Examples
    This operation retrieves a Lambda function's event source mapping
    Expected Output:
    
    :example: response = client.get_event_source_mapping(
        UUID='string'
    )
    
    
    :type UUID: string
    :param UUID: [REQUIRED]
            The AWS Lambda assigned ID of the event source mapping.
            

    :rtype: dict
    :return: {
        'UUID': 'string',
        'BatchSize': 123,
        'EventSourceArn': 'string',
        'FunctionArn': 'string',
        'LastModified': datetime(2015, 1, 1),
        'LastProcessingResult': 'string',
        'State': 'string',
        'StateTransitionReason': 'string'
    }
    
    
    """
    pass
