Set the attributes of this item.
The attributes
are a mapping of string keys to string values. Attributes are used to search for items. Attributes are not
stored or transferred securely by the secret service.
This function returns immediately and completes asynchronously.
this |
an item |
schema |
the schema for the attributes |
attributes |
a new set of attributes |
cancellable |
optional cancellation object |
callback |
called when the asynchronous operation completes |
user_data |
data to pass to the callback |