Sets the hint for this line edit that will be displayed when in \
        editable mode.
        
        :param      hint | <str>

def setHint( self, hint ):
        """
        Sets the hint for this line edit that will be displayed when in \
        editable mode.
        
        :param      hint | <str>
        """
        self._hint = hint
        
        lineEdit   = self.lineEdit()
        if isinstance(lineEdit, XLineEdit):
            lineEdit.setHint(hint)