docs: def keyPressEvent( self, event ):
          """
          Overloads the keyPressEvent method to support backtab operations.
          
          :param      event | <QKeyPressEvent>
          """
          if ( event.key() == Qt.Key_Backtab ):
              self.unindentSelection()
          else:
              super(XScintillaEdit, self).keyPressEvent(event)