The delegate callback to execute when invoking the post command.
This widget to aid method chaining.
These are the fields within the callback's CommandArgs parameter which are populated by this method when the callback is executed.
$(PARAM_TABLE $(PARAM_ROW CommandArgs.element, The element that executed the callback.) $(PARAM_ROW CommandArgs.uniqueData, The string 'postcommand'.) $(PARAM_ROW CommandArgs.callback, The callback which was executed.) )
Add a post command to a widget. This is usually to modify the widget after creation.