// There is no response for all-notification batches.-->[{"jsonrpc":"2.0","method":"test_echo","params":["x",99]}]// This test checks regular batch calls.-->[{"jsonrpc":"2.0","id":2,"method":"test_echo","params":[]},{"jsonrpc":"2.0","id":3,"method":"test_echo","params":["x",3]}]<--[{"jsonrpc":"2.0","id":2,"error":{"code":-32602,"message":"missing value for required argument 0"}},{"jsonrpc":"2.0","id":3,"result":{"String":"x","Int":3,"Args":null}}]