Used when accessibility capability is available to locate an occurrance
of the field in the most derived class or superclass and set its
accessibility flag.
Locate a version of the method with the exact signature specified
that is accessible via a public interface or through a public
superclass or - if accessibility is on - through any interface or
superclass.
This is the full blown classpath including baseClassPath (extensions),
user path, and java bootstrap path (rt.jar)
This is lazily constructed and further (and more importantly) lazily
intialized in components because mapping the full path could be
expensive.