simple-bimap (npm): <div align="center">    <h1>🗺️↔️ simple-bimap</h1>    <a href="https://www.npmjs.com/package/simple-bimap">      <img src="https://img.shields.io/npm/v/simple-bimap" alt="simple-bimap on npm">    </a>    <a href="https://github.com/aleksander-ciesielski/
Keywords: map|bimap|bidirectional-map