def get_certificate(self, certificate_id):
        """Get certificate by id.

        :param str certificate_id: The certificate id (Required)
        :returns: Certificate object
        :rtype: Certificate
        """
        api = self._get_api(iam.DeveloperApi)
        certificate = Certificate(api.get_certificate(certificate_id))
        self._extend_certificate(certificate)
        return certificate