def delete_db_subnet_group(DBSubnetGroupName=None):
    """
    Deletes a DB subnet group.
    See also: AWS API Documentation
    
    Examples
    This example deletes the specified DB subnetgroup.
    Expected Output:
    
    :example: response = client.delete_db_subnet_group(
        DBSubnetGroupName='string'
    )
    
    
    :type DBSubnetGroupName: string
    :param DBSubnetGroupName: [REQUIRED]
            The name of the database subnet group to delete.
            Note
            You cannot delete the default subnet group.
            Constraints:
            Constraints: Must contain no more than 255 alphanumeric characters, periods, underscores, spaces, or hyphens. Must not be default.
            Example: mySubnetgroup
            

    :return: response = client.delete_db_subnet_group(
        DBSubnetGroupName='mydbsubnetgroup',
    )
    
    print(response)
    
    
    """
    pass
