private boolean isFalledTo(CodeUnit cu) {
		CodeUnit prev = getPreviousCodeUnit(cu);
		return (prev instanceof Instruction && ((Instruction) prev).hasFallthrough());
	}
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