def lineEdit(self):
        """
        Returns the line editor associated with this combobox.  This will
        return the object stored at the reference for the editor since
        sometimes the internal Qt process will raise a RuntimeError that
        the C/C++ object has been deleted.
        
        :return     <XLineEdit> || None
        """
        try:
            edit = self._lineEdit()
        except TypeError:
            edit = None

        if edit is None:
            self._edit = None
        return edit