Build the string equivalent to the text contained in the
           Node list made of TEXTs and ENTITY_REFs

def listGetString(self, doc, inLine):
        """Build the string equivalent to the text contained in the
           Node list made of TEXTs and ENTITY_REFs """
        if doc is None: doc__o = None
        else: doc__o = doc._o
        ret = libxml2mod.xmlNodeListGetString(doc__o, self._o, inLine)
        return ret