def METHOD_NAME(self, content_disposition=None, content_type=None,
                   content_location=None):
    """
    Makes this request field into a multipart request field.
    This method overrides "Content-Disposition", "Content-Type" and
    "Content-Location" headers to the request parameter.
    :param content_type:
        The 'Content-Type' of the request body.
    :param content_location:
        The 'Content-Location' of the request body.
    """
    self.headers['Content-Disposition'] = content_disposition or 'form-data'
    self.headers['Content-Disposition'] += '; '.join([
        '', self._render_parts(
            (('name', self._name), ('filename', self._filename))
        )
    ])
    self.headers['Content-Type'] = content_type
    self.headers['Content-Location'] = content_location