Watchman Sync Sub

:::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. :::

namespace HH;

function watchman_sync_sub(
  string $sub_name,
  int $timeout_ms = 0,
): Awaitable<bool>;

Parameters

• string $sub_name
• int $timeout_ms = 0

Returns

• Awaitable<bool>