@spectrum-web-components/icons-ui/icons/sp-icon-checkmark600.d.ts

Deliver [Spectrum UI Icons](https://spectrum.adobe.com/page/icons/) as either:

import { IconCheckmark600 } from '../src/elements/IconCheckmark600.js';
declare global {
    interface HTMLElementTagNameMap {
        'sp-icon-checkmark600': IconCheckmark600;
    }
}