>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3392472. --> Reported by: [swirt](https://www.drupal.org/user/138230) >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>Improve this module's documentation.</p> <ul> <li>Populate the readme</li> <ul> <li>describe the field's sub-fields</li> <li>Links to mermaid documentation</li> <li>Link to mermaid live</li> <li>Describe how to implement the render array.</li> </ul> <li>Connect help to use the readme.</li> </ul> <h4 id="summary-steps-reproduce">Steps to reproduce</h4> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <h3 id="summary-remaining-tasks">Remaining tasks</h3> <h3 id="summary-ui-changes">User interface changes</h3> <h3 id="summary-api-changes">API changes</h3> <h3 id="summary-data-model-changes">Data model changes</h3>