return gen.mkApply_V(gen.mkRef(tree.pos, symbol), new Tree[]{tree});
return gen.mkApply_V( gen.mkGlobalRef(tree.pos, symbol), new Tree[]{tree});
    private Tree convert(Tree tree, Type to) {        Symbol symbol = primitives.getConvertSymbol(tree.type(), to);        return gen.mkApply_V(gen.mkRef(tree.pos, symbol), new Tree[]{tree});    }