8005801: Refactor findSetMethod
Summary: findSetMethod() was a very large single method, very unreadable and unmaintainable. It was broken into easy-to-understand pieces. The refactoring required introduction of a comand-object like entity, SetMethodCreator, to contain the nontrivial transient state of the algorithm that made the original big method so resistant to refactoring in the first place.
Reviewed-by: lagergren, sundar