Only the owner of a AccessHandler may view its rule feed.
cancellable is not
null, then the operation can be cancelled by triggering the
from another thread. If the operation was cancelled, the error CANCELLED
will be returned.
A PROTOCOL_ERROR will be returned if the server indicates there is a problem with the query.
For each rule in the response feed,
progress_callback will be called in the main thread. If there was an error parsing the XML
response, a ParserError will be returned.
optional Cancellable object, or
a QueryProgressCallback to call when a rule is loaded, or
data to pass to the