// reference to primitive --> unsafe autoboxing
Class<?> fromPrim = getPrimitiveType((RefType) from);
Class<?> toPrim = getPrimitiveType((PrimType) to);
if (fromPrim != null && toPrim.isAssignableFrom(fromPrim)) {
assignable = true;
Feedbacks.add(new PossibleNullPointerInMakeURL(from, to));
}
} else if (from instanceof PrimType && to instanceof RefType) {
// primitive to reference--> safe autoboxing
Class<?> fromPrim = getPrimitiveType((PrimType) from);
Class<?> toPrim = getPrimitiveType((RefType) to);