Iterator<InstructionTargeter> tIter = src.getTargeters().iterator();
while (tIter.hasNext()) {
InstructionTargeter old = tIter.next();
if (old instanceof Tag) {
Tag oldTag = (Tag) old;
Tag fresh = tagMap.get(oldTag);
if (fresh == null) {
fresh = oldTag.copy();
if (old instanceof LocalVariableTag) {
// LocalVariable
LocalVariableTag lvTag = (LocalVariableTag) old;