17 #ifndef QGSAPPLYDIALOG_H    18 #define QGSAPPLYDIALOG_H    40     virtual void apply() 
const = 0;
 Interface class for dialogs that have an apply operation (e.g. 
 
virtual void apply() const =0
This method is called when changes should be applied. 
 
QgsApplyDialog()=default
Constructor for QgsApplyDialog.