Function isPossiblyReducibleByInstantiation

test/fixtures/snapshot/typescript.js:61856–61861

* A union type which is reducible upon instantiation (meaning some members are removed under certain instantiations) * must be kept generic, as that instantiation information needs to flow through the type system. By replacing all * type parameters in the union with a special never

(type)

         * to reduce the resulting type if possible (since only intersections with conflicting literal-typed properties are reducible).
         */
        function isPossiblyReducibleByInstantiation(type) {
            return ts.some(type.types, function (t) {
                var uniqueFilled = getUniqueLiteralFilledInstantiation(t);
                return getReducedType(uniqueFilled) !== uniqueFilled;
            });
        }
        function getIndexType(type, stringsOnly, noIndexSignatures) {
            if (stringsOnly === void 0) { stringsOnly = keyofStringsOnly; }
            type = getReducedType(type);