Function isStringIndexSignatureOnlyType

test/fixtures/snapshot/typescript.js:64515–64519

(type)

                type.symbol && type.symbol.flags & 2048 /* SymbolFlags.TypeLiteral */ && getMembersOfSymbol(type.symbol).size === 0));
        }
        function isStringIndexSignatureOnlyType(type) {
            return type.flags & 524288 /* TypeFlags.Object */ && !isGenericMappedType(type) && getPropertiesOfType(type).length === 0 && getIndexInfosOfType(type).length === 1 && !!getIndexInfoOfType(type, stringType) ||
                type.flags & 3145728 /* TypeFlags.UnionOrIntersection */ && ts.every(type.types, isStringIndexSignatureOnlyType) ||
                false;
        }
        function isEnumTypeRelatedTo(sourceSymbol, targetSymbol, errorReporter) {
            if (sourceSymbol === targetSymbol) {
                return true;