def string_value ( self, value ):
        """ Returns the text representation of a specified object trait value.
        """
        if value is not None:
            return ''
        return str( value )

    #---------------------------------------------------------------------------
    #  Handles an error that occurs while setting the object's trait value:
    #---------------------------------------------------------------------------
dataset/ETHPy150Open enthought/traitsui/traitsui/qt4/drop_editor.py/SimpleEditor.string_value/operator `is` -> `is not`