def METHOD_NAME(self, iconText):
    """Override the iconText of the the source action.
    Property can be removed by using None. In this case the text set back
    using the sourceAction.
    """
    self.__forcedIconText = iconText
    if self.__forcedIconText is None:
        iconText = self.sourceAction().iconText()
    super(CustomProxyAction, self).setIconText(iconText)