Constructs a PrintServiceAttributeEvent object.
Parameters: - source - the print job generating this event
- attributes - the attribute changes being reported
Throws: - IllegalArgumentException - if source is
null.
Determine the printing service attributes that changed and their new
values.
Determine the printing service attributes that changed and their new values.
Returns:
Attributes containing the new values for the service
attributes that changed. The returned set may be unmodifiable.