Method cancel

stub/src/test/java/io/grpc/stub/ClientCallsTest.java:385–389

(String message, Throwable cause)

      }

      @Override
      public void cancel(String message, Throwable cause) {
        cancelMessage.set(message);
        cancelCause.set(cause);
      }
    };
    Integer req = 2;
    ListenableFuture<String> future = ClientCalls.futureUnaryCall(call, req);