@Override
	public void setAddrTied(Varnode vn, boolean val) {
		VarnodeAST vnast = (VarnodeAST) vn;
		vnast.setAddrtied(val);
	}
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