FillBufferAsync

:::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. :::

private function fillBufferAsync(
  ?int $desired_bytes,
  ?int $timeout_ns,
): Awaitable<void>;

Parameters

• ?int $desired_bytes
• ?int $timeout_ns

Returns

• Awaitable<void>