def get_returnvalue(self):
        if len(self.signature) > 0:
            return self.signature[0]
        return None
Returns the return value which is the first element of the signature
dataset/ETHPy150Open fp7-ofelia/ocf/optin_manager/src/python/openflow/common/rpc4django/rpcdispatcher.py/RPCMethod.get_returnvalue