Special GetPassage implementation for SimplePassage (Simple is True by default)

        :param subreference:
        :return:

def getTextualNode(self, subreference: CtsReference=None):
        """ Special GetPassage implementation for SimplePassage (Simple is True by default)

        :param subreference:
        :return:
        """
        if not isinstance(subreference, CtsReference):
            subreference = CtsReference(subreference)
        return self.textObject.getTextualNode(subreference)