def on_rpc(self, node):
        name, input_type, output_type = self.visit(*node.children)
        yield classes.RPC(name, input_type, output_type)
rpc: "rpc" indent "(" userType ")" "returns" "(" userType ")" ";"
dataset/ETHPy150Open Evgenus/protocyt/protocyt/compiler.py/CodeGenerator.on_rpc