AddAll

:::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. :::

For every element in the provided Traversable, append a value into the current collection

public function addAll(
  ?Traversable<Te> $traversable,
): this;

It returns the current collection, meaning changes made to the current collection will be reflected in the returned collection.

Parameters

• ?Traversable<Te>$traversable - The Traversable with the new values to set. If null is provided, no changes are made.

Returns

• this - Returns itself.