Refine initialize() utilizing tighter preconditions.
Refine initialize() utilizing tighter preconditions.

Now that the Java runtime classes are processed during preScanAllClasses(),
we can assume as a precondition during initialize() that all potential classes are
known before loadAllClasses is run.

RedSeal-co/ts-java,RedSeal-co/ts-java,RedSeal-co/ts-java,RedSeal-co/ts-java