@stackline/once is an independent maintained continuation of once. It is not
affiliated with or endorsed by Isaac Z. Schlueter, npm, or the upstream
project.

The implementation derives from the ISC-licensed once@1.4.0 artifact, the
signed ISC-licensed upstream v1.4.1 tag, and the observable property-copying
contract of ISC-licensed wrappy@1.0.2:

Copyright (c) 2012-2022 Isaac Z. Schlueter and Contributors

Stackline maintenance, packaging, declarations, documentation, hardening, and
additional tests are Copyright (c) 2026 Stackline Maintainers.

See LICENSE for the complete ISC terms and THIRD_PARTY_LICENSES.md for the
provenance inventory.