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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 formMarkup(self, realm, return_to=None, immediate=False, form_tag_attrs=None):
 """Get html for a form to submit this request to the IDP. @param form_tag_attrs: Dictionary of attributes to be added to the form tag. 'accept-charset' and 'enctype' have defaults that can be overridden. If a value is supplied for 'action' or 'method', it will be replaced. @type form_tag_attrs: {unicode: unicode} """

        message = self.getMessage(realm, return_to, immediate)
        return message.toFormMarkup(self.endpoint.server_url,
                    form_tag_attrs)