Function getConstituentTypeForKeyType

test/fixtures/snapshot/typescript.js:69507–69511

(unionType, keyType)

        // Given a union type for which getKeyPropertyName returned a non-undefined result, return the constituent
        // that corresponds to the given key type for that property name.
        function getConstituentTypeForKeyType(unionType, keyType) {
            var _a;
            var result = (_a = unionType.constituentMap) === null || _a === void 0 ? void 0 : _a.get(getTypeId(getRegularTypeOfLiteralType(keyType)));
            return result !== unknownType ? result : undefined;
        }
        function getMatchingUnionConstituentForType(unionType, type) {
            var keyPropertyName = getKeyPropertyName(unionType);
            var propType = keyPropertyName && getTypeOfPropertyOfType(type, keyPropertyName);