@spectrum-web-components/icons-ui/icons/sp-icon-corner-triangle300.d.ts

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

import { IconCornerTriangle300 } from '../src/elements/IconCornerTriangle300.js';
declare global {
    interface HTMLElementTagNameMap {
        'sp-icon-corner-triangle300': IconCornerTriangle300;
    }
}