Function typePredicateToStringWorker

test/fixtures/snapshot/typescript.js:55344–55351

(writer)

            if (flags === void 0) { flags = 16384 /* TypeFormatFlags.UseAliasDefinedOutsideCurrentScope */; }
            return writer ? typePredicateToStringWorker(writer).getText() : ts.usingSingleLineStringWriter(typePredicateToStringWorker);
            function typePredicateToStringWorker(writer) {
                var predicate = ts.factory.createTypePredicateNode(typePredicate.kind === 2 /* TypePredicateKind.AssertsThis */ || typePredicate.kind === 3 /* TypePredicateKind.AssertsIdentifier */ ? ts.factory.createToken(128 /* SyntaxKind.AssertsKeyword */) : undefined, typePredicate.kind === 1 /* TypePredicateKind.Identifier */ || typePredicate.kind === 3 /* TypePredicateKind.AssertsIdentifier */ ? ts.factory.createIdentifier(typePredicate.parameterName) : ts.factory.createThisTypeNode(), typePredicate.type && nodeBuilder.typeToTypeNode(typePredicate.type, enclosingDeclaration, toNodeBuilderFlags(flags) | 70221824 /* NodeBuilderFlags.IgnoreErrors */ | 512 /* NodeBuilderFlags.WriteTypeParametersInQualifiedName */) // TODO: GH#18217
                );
                var printer = ts.createPrinter({ removeComments: true });
                var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
                printer.writeNode(4 /* EmitHint.Unspecified */, predicate, /*sourceFile*/ sourceFile, writer);
                return writer;
            }
        }
        function formatUnionTypes(types) {
            var result = [];