@Override
		public String toString() {
			return "(" + assignedAt.getTarget() + ", " + register.getName() + "=" +
				value.toString(program.getLanguage()) + ")";
		}
Check value assignments for items of interest:
<ul>
<li>Frame pointer identification</li>
<li>Tracking of modified registers</li>
</ul>
@param output output varnode
@param value assigned value
@param op pcode operation
@throws CancelledException
Ghidra/Features/Base/src/main/java/ghidra/util/state/ResultsState.java