def describe_orderable_replication_instances(MaxRecords=None, Marker=None):
    """
    Returns information about the replication instance types that can be created in the specified region.
    See also: AWS API Documentation
    
    
    :example: response = client.describe_orderable_replication_instances(
        MaxRecords=123,
        Marker='string'
    )
    
    
    :type MaxRecords: integer
    :param MaxRecords: The maximum number of records to include in the response. If more records exist than the specified MaxRecords value, a pagination token called a marker is included in the response so that the remaining results can be retrieved.
            Default: 100
            Constraints: Minimum 20, maximum 100.
            

    :type Marker: string
    :param Marker: An optional pagination token provided by a previous request. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by MaxRecords .

    :rtype: dict
    :return: {
        'OrderableReplicationInstances': [
            {
                'EngineVersion': 'string',
                'ReplicationInstanceClass': 'string',
                'StorageType': 'string',
                'MinAllocatedStorage': 123,
                'MaxAllocatedStorage': 123,
                'DefaultAllocatedStorage': 123,
                'IncludedAllocatedStorage': 123
            },
        ],
        'Marker': 'string'
    }
    
    
    """
    pass
