def list_resource_extension_versions(self, publisher_name, extension_name):
return self._perform_get(self._get_resource_extension_versions_path(<EOL>publisher_name, extension_name),<EOL>ResourceExtensions)<EOL>
Lists the versions of a resource extension that are available to add
to a Virtual Machine.

publisher_name:
    Name of the resource extension publisher.
extension_name:
    Name of the resource extension.