Get the specified attributes from the object.
The attributes will be cleared of their current values, and new attributes will be stored. The attributes should not be accessed in any way except for referencing and unreferencing them until get_async.end is called.
This call returns immediately and completes asynchronously.
| this |
The object to get attributes from. |
| attr_types |
the types of the attributes to get |
| cancellable |
optional cancellation object, or |
| callback |
A callback which is called when the operation completes. |
| n_attr_types |
the number of attr_types |
| user_data |
Data to be passed to the callback. |