public Value naryOperation(final AbstractInsnNode insn, final List values) {
        int size;
        if (insn.getOpcode() == MULTIANEWARRAY) {
            size = 1;
        } else {
            size = Type.getReturnType(((MethodInsnNode) insn).desc).getSize();
        }
        return new SourceValue(size, insn);
    }