@Override
	public PcodeOp getOpRef(int id) {
		if (oprefmap == null) {
			buildOpRefs();
		}
		return oprefmap.get(id);
	}
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