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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def to_text(self):
 """Render a Text MessageElement as plain text. :returns: The plain text representation of the Text MessageElement. :rtype: basestring """

        if self.items is None:
            return
        else:
            text = ''
            for item in self.items:
                text += ' - %s\n' % item.to_text()

            return text