'Add some text data to this Element.'

def addContent(self, text):

    text = _coercedUnicode(text)
    c = self.children
    if ((len(c) > 0) and isinstance(c[(-1)], unicode)):
        c[(-1)] = (c[(-1)] + text)
    else:
        c.append(text)
    return c[(-1)]
