private boolean isDeadCode(CodeUnit cu) {

		if (!(cu instanceof Instruction)) {
			return false;
		}

		if (isFalledTo(cu)) {
			return false;
		}

		if (hasReferencesTo(cu)) {
			return false;
		}

		return !((Instruction) cu).isInDelaySlot();
	}
Get a stars string based upon the available width.
@return string of '*'s
Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/field/PlateFieldFactory.java