public Expression getArgument(int argument) {
if (!(mTargetNode instanceof MethodInvocation)) {
return null;
}
MethodInvocation call = (MethodInvocation) mTargetNode;
StrictListAccessor<Expression, MethodInvocation> args = call.astArguments();
if (argument >= args.size()) {
return null;
}
Iterator<Expression> iterator = args.iterator();