@spectrum-web-components/icons-workflow/icons/sp-icon-flash-on.d.ts

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

import { IconFlashOn } from '../src/elements/IconFlashOn.js';
declare global {
    interface HTMLElementTagNameMap {
        'sp-icon-flash-on': IconFlashOn;
    }
}