*/
  public void callAndAssertReturns(String methodName, Object... arguments) throws Exception {
    checkNotNull(methodName);
    checkNotNull(arguments);
    sendRequest(methodName, arguments);
    assertThat(getResponse(methodName).getResult()).isNull();
  }

  /**
   * Causes this thread to call the named method, and asserts that the call returns the expected
   * boolean value.

   */
  public void callAndAssertReturns(String methodName, Object... arguments) throws Exception {
    checkNotNull(methodName);
    checkNotNull(arguments);
    sendRequest(methodName, arguments);
    assertThat(getResponse(methodName).getResult()).isNull();
  }

  /**
   * Causes this thread to call the named method, and asserts that the call returns the expected
   * boolean value.