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toImmSet

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 immutable copy (ImmSet) of the current ImmSet

public function toImmSet(): ImmSet<Tv>;

This function is interchangeable with immutable().

Returns​

  • ImmSet<Tv> - an ImmSet that is a copy of the current ImmSet.

Examples​

See Set::toImmSet for usage examples.