'Sets a bucket\'s or objects\'s ACL to an XML string.
:type acl_str: string
:param acl_str: A string containing the ACL XML.
:type key_name: string
:param key_name: A key name within the bucket to set the ACL for. If not
specified, the ACL for the bucket will be set.
:type headers: dict
:param headers: Additional headers to set during the request.
:type version_id: string
:param version_id: Unused in this subclass.
:type query_args: str
:param query_args: The query parameters to pass with the request.
:type generation: int
:param generation: If specified, sets the ACL for a specific generation
of a versioned object. If not specified, the current version is
modified.
:type if_generation: int
:param if_generation: (optional) If set to a generation number, the acl
will only be updated if its current generation number is this value.
:type if_metageneration: int
:param if_metageneration: (optional) If set to a metageneration number,
the acl will only be updated if its current metageneration number is
this value.'

def set_xml_acl(self, acl_str, key_name='', headers=None, version_id=None, query_args='acl', generation=None, if_generation=None, if_metageneration=None):

    return self._set_acl_helper(acl_str, key_name=key_name, headers=headers, query_args=query_args, generation=generation, if_generation=if_generation, if_metageneration=if_metageneration)
