def submit(self, make_request=True, **kwargs):
        """
        Submit current form.

        :param make_request: if `False` then grab instance will be
            configured with form post data but request will not be
            performed

        For details see `Document.submit()` method

        Example::

            # Assume that we going to some page with some form
            g.go('some url')
            # Fill some fields
            g.doc.set_input('username', 'bob')
            g.doc.set_input('pwd', '123')
            # Submit the form
            g.submit()

            # or we can just fill the form
            # and do manual submission
            g.doc.set_input('foo', 'bar')
            g.submit(make_request=False)
            g.request()

            # for multipart forms we can specify files
            from grab import UploadFile
            g.doc.set_input('img', UploadFile('/path/to/image.png'))
            g.submit()
        """
        result = self.doc.get_form_request(**kwargs)
        if result['multipart_post']:
            self.setup(multipart_post=result['multipart_post'])
        if result['post']:
            self.setup(post=result['post'])
        if result['url']:
            self.setup(url=result['url'])
        if make_request:
            return self.request()
        else:
            return None
Submit current form.

        :param make_request: if `False` then grab instance will be
            configured with form post data but request will not be
            performed

        For details see `Document.submit()` method

        Example::

            # Assume that we going to some page with some form
            g.go('some url')
            # Fill some fields
            g.doc.set_input('username', 'bob')
            g.doc.set_input('pwd', '123')
            # Submit the form
            g.submit()

            # or we can just fill the form
            # and do manual submission
            g.doc.set_input('foo', 'bar')
            g.submit(make_request=False)
            g.request()

            # for multipart forms we can specify files
            from grab import UploadFile
            g.doc.set_input('img', UploadFile('/path/to/image.png'))
            g.submit()