method WriteStream.prototype.once
#WriteStream.prototype.once(event: "close",listener: () => void,): this#WriteStream.prototype.once(event: "drain",listener: () => void,): this#WriteStream.prototype.once(event: "error",listener: (err: Error) => void,): this#WriteStream.prototype.once(event: "finish",listener: () => void,): this#WriteStream.prototype.once(event: "open",listener: (fd: number) => void,): this#WriteStream.prototype.once(event: "pipe",listener: (src: stream.Readable) => void,): this#WriteStream.prototype.once(event: "ready",listener: () => void,): this#WriteStream.prototype.once(event: "unpipe",listener: (src: stream.Readable) => void,): this