private static void assertOptionsAreDistinct(GetBlobOptions a, GetBlobOptions b) {
    assertThat("GetBlobOptions should not be equal.", a, not(b));
    assertThat("GetBlobOptions toString should not be equal", a.toString(), not(b.toString()));
    // Note: don't compare hashcodes since collisions are possible.
  }
Verify that two instances of GetBlobOptions are not equal and have distinct toStrings.
@param a first instance
@param b second instance
ambry-api/src/test/java/com/github/ambry/router/GetBlobOptionsTest.java