Fix HashMapIdObject.toString() on an empty map - #319

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: dorny/test-reporter@v2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

sun.misc.Unsafe is internal proprietary API and may be removed in a future release

sun.misc.Unsafe is internal proprietary API and may be removed in a future release

sun.misc.Unsafe is internal proprietary API and may be removed in a future release

sun.misc.Unsafe is internal proprietary API and may be removed in a future release

sun.misc.Unsafe is internal proprietary API and may be removed in a future release

sun.misc.Unsafe is internal proprietary API and may be removed in a future release

sun.misc.Unsafe is internal proprietary API and may be removed in a future release

sun.misc.Unsafe is internal proprietary API and may be removed in a future release

sun.misc.Unsafe is internal proprietary API and may be removed in a future release

sun.misc.Unsafe is internal proprietary API and may be removed in a future release