Function instantiateMappedArrayType

test/fixtures/snapshot/typescript.js:63557–63561

(arrayType, mappedType, mapper)

            return createTupleType(elementTypes, ts.map(elementTypes, function (_) { return 8 /* ElementFlags.Variadic */; }), newReadonly);
        }
        function instantiateMappedArrayType(arrayType, mappedType, mapper) {
            var elementType = instantiateMappedTypeTemplate(mappedType, numberType, /*isOptional*/ true, mapper);
            return isErrorType(elementType) ? errorType :
                createArrayType(elementType, getModifiedReadonlyState(isReadonlyArrayType(arrayType), getMappedTypeModifiers(mappedType)));
        }
        function instantiateMappedTupleType(tupleType, mappedType, mapper) {
            var elementFlags = tupleType.target.elementFlags;
            var elementTypes = ts.map(getTypeArguments(tupleType), function (_, i) {