public void SetParam()
        {
            GetRequestBuilder <int, Greeting> b = new GetRequestBuilder <int, Greeting>(baseUrl);

            Assert.IsFalse(b.HasParam("param1"));

            b.SetParam("param1", 123);
            Assert.IsTrue(b.HasParam("param1"));
            Assert.AreEqual(123, b.GetParam("param1"));

            b.SetParam("param1", "value1");
            b.SetParam("param2", "value2");
            Assert.AreEqual("value1", b.GetParam("param1"));
            Assert.IsTrue(b.HasParam("param2"));
            Assert.AreEqual("value2", b.GetParam("param2"));

            b.SetParams(new Dictionary <string, object>()
            {
                { "param1", "new value1" }
            });
            Assert.IsTrue(b.HasParam("param1"));
            Assert.AreEqual("new value1", b.GetParam("param1"));
            Assert.IsTrue(b.HasParam("param2"));
            Assert.AreEqual("value2", b.GetParam("param2"));

            b.ClearParams();
            Assert.IsFalse(b.HasParam("param1"));
            Assert.IsFalse(b.HasParam("param2"));
        }