public VarnodeAST findMatch(Varnode vnLeft) {
		DataVertex vertLeft = graphLeft.vnToVert.get(vnLeft);
		if (vertLeft == null) {
			return null;
		}
		DataVertex vertRight = pinMap.get(vertLeft);
		if (vertRight != null) {
			return vertRight.vn;
		}
		return null;
	}
Find the RIGHT side Varnode matching the given LEFT side Varnode.
The LEFT and RIGHT sides are determined by the order HighFunctions are given to the constructor.
@param vnLeft is the given Varnode from LEFT side
@return the matching Varnode from RIGHT side or null
Ghidra/Features/CodeCompare/src/main/java/ghidra/features/codecompare/graphanalysis/Pinning.java