How to use the @ts-tools/transpile.readCacheFileSync function in @ts-tools/transpile

retrieveSourceMap(filePath) {
                const cacheFilePath = join(optionsScopedCachePath, filePathToCacheFileName(filePath));
                const cachedOutput = readCacheFileSync(cacheFilePath);
                if (cachedOutput && cachedOutput.mtime === statSync(filePath).mtime.getTime()) {
                    const { sourceMapText, outputText } = cachedOutput;
                    const map = sourceMapText || extractInlineSourceMap(outputText);
                    if (map) {
                        return { map, url: filePath };
                    }
                }
                return null;
            }
        });