method WritableBase.prototype.once
#WritableBase.prototype.once(event: "close",listener: () => void,): this#WritableBase.prototype.once(event: "drain",listener: () => void,): this#WritableBase.prototype.once(event: "error",listener: (err: Error) => void,): this#WritableBase.prototype.once(event: "finish",listener: () => void,): this#WritableBase.prototype.once(event: "pipe",listener: (src: Readable) => void,): this#WritableBase.prototype.once(event: "unpipe",listener: (src: Readable) => void,): this