public AbstractRequestBuilder<K, V, R> setReqParam(String key, Object value)
  {
    ArgumentUtil.notNull(value, "value");
    return setParam(key, value);
  }
@Test(expectedExceptions = NullPointerException.class)
  public void testSetReqParamWithNullValue()
  {
    final AbstractRequestBuilder<?, ?, ?> builder = new DummyAbstractRequestBuilder();
    builder.setReqParam("a", null);
  }