public static Varnode findVarnode(PcodeSyntaxTree fd, Address addr, long h) {
		DynamicHash dhash = new DynamicHash();
		int method = getMethodFromHash(h);
		int total = getTotalFromHash(h);
		int pos = getPositionFromHash(h);
		h = clearTotalPosition(h);
		ArrayList<Varnode> vnlist = new ArrayList<>();
		ArrayList<Varnode> vnlist2 = new ArrayList<>();
		gatherFirstLevelVars(vnlist, fd, addr, h);
		for (int i = 0; i < vnlist.size(); ++i) {
			Varnode tmpvn = vnlist.get(i);
			dhash.clear();
			dhash.calcHash(tmpvn, method);
			if (getComparable(dhash.getHash()) == getComparable(h)) {
				vnlist2.add(tmpvn);
			}
		}
		if (total != vnlist2.size()) {
			return null;
		}
		return vnlist2.get(pos);
	}
Encode a particular PcodeOp and slot
@param op is the PcodeOp to preserve
@param slot is the slot to preserve (-1 for output, >=0 for input)
@param method is the method to use for encoding (4, 5, or 6)
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/DynamicHash.java