code: public static Reference newInstance(Requirement requirement, Specification specification, SystemUnderTest sut)
      {
          return newInstance(requirement, specification, sut, null);
      }
docs: <p>newInstance.</p>
  
  @param requirement a {@link com.greenpepper.server.domain.Requirement} object.
  @param specification a {@link com.greenpepper.server.domain.Specification} object.
  @param sut a {@link com.greenpepper.server.domain.SystemUnderTest} object.
  @return a {@link com.greenpepper.server.domain.Reference} object.