Add

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Add an additional awaitable to the poll

public function add(
  Awaitable<Tv> $awaitable,
): void;

Parameters

• Awaitable<Tv>$awaitable

Returns

• void