public Varnode[] getLikelyTrash() {
		if (likelytrash == null) {
			likelytrash = new Varnode[0];
		}
		return likelytrash;
	}
@return list of registers whose input value is likely meaningless
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/lang/PrototypeModel.java