@Override
	public Varnode setInput(Varnode vn, boolean val) {
		if ((!vn.isInput()) && val) {
			return vbank.setInput(vn);
		}
		if (vn.isInput() && (!val)) {
			vbank.makeFree(vn);
		}
		return vn;
	}
return all PcodeOps associated with a particular instruction Address
@param addr -- Address of instruction generating PcodeOps
@return -- Iterator to PcodeOps
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/PcodeSyntaxTree.java