Keys

:::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. :::

Returns an ImmVector containing the values of this ImmSet

public function keys(): ImmVector<arraykey>;

ImmSets don't have keys, so this will return the values.

This method is interchangeable with toImmVector() and values().

Returns

• ImmVector<arraykey> - an ImmVector containing the values of the current ImmSet.

Examples

See Set::keys for usage examples.