@spectrum-web-components/action-group/sp-action-group.d.ts

`sp-action-group` delivers a set of action buttons in horizontal or vertical orientation while ensuring the appropriate spacing between those buttons. The `compact` attribute merges these buttons so that they are visually joined to clarify their relations

import { ActionGroup } from './src/ActionGroup.js';
declare global {
    interface HTMLElementTagNameMap {
        'sp-action-group': ActionGroup;
    }
}