def updatetext(self):
        """Recompute textual value based on the text content of the children. Only supported on elements that are a ``TEXTCONTAINER``"""
        if self.TEXTCONTAINER:
            s = ""
            for child in self:
                if isinstance(child, AbstractElement):
                    child.updatetext()
                    s += child.text()
                elif isstring(child):
                    s += child
            self.data = [s]
Recompute textual value based on the text content of the children. Only supported on elements that are a ``TEXTCONTAINER``