class FileHandler extends WriterHandlerimport { FileHandler } from "https://deno.land/std@0.80.0/log/handlers.ts"; ConstructorsnewFileHandler(levelName: LevelName, options: FileHandlerOptions)Propertiesprotected_buf: BufWriterSyncprotected_encoder: TextEncoderprotected_file: Deno.File | undefinedprotected_filename: stringprotected_mode: LogModeprotected_openOptions: Deno.OpenOptionsMethodsdestroy(): Promise<void>flush(): voidhandle(logRecord: LogRecord): voidlog(msg: string): voidsetup(): Promise<void>