Method should_subtract

source/python.js:10902–10902

(lhs)

            subtractTypeSetFrom(to_subtract, from) {
                const types = [];
                const should_subtract = (lhs) => to_subtract.some((rhs) => lhs.isSubtypeOf(rhs));
                for (const t of from) {
                    if (!should_subtract(t)) {
                        types.push(t);