def set_default_policy_version(PolicyArn=None, VersionId=None):
    """
    Sets the specified version of the specified policy as the policy's default (operative) version.
    This action affects all users, groups, and roles that the policy is attached to. To list the users, groups, and roles that the policy is attached to, use the  ListEntitiesForPolicy API.
    For information about managed policies, see Managed Policies and Inline Policies in the IAM User Guide .
    See also: AWS API Documentation
    
    
    :example: response = client.set_default_policy_version(
        PolicyArn='string',
        VersionId='string'
    )
    
    
    :type PolicyArn: string
    :param PolicyArn: [REQUIRED]
            The Amazon Resource Name (ARN) of the IAM policy whose default version you want to set.
            For more information about ARNs, see Amazon Resource Names (ARNs) and AWS Service Namespaces in the AWS General Reference .
            

    :type VersionId: string
    :param VersionId: [REQUIRED]
            The version of the policy to set as the default (operative) version.
            For more information about managed policy versions, see Versioning for Managed Policies in the IAM User Guide .
            

    """
    pass
