JSPM

import { TemplateResult } from 'lit-element';
import { IconsetSVG } from '@spectrum-web-components/iconset/src/iconset-svg.js';

import { CustomIconSet } from 'your-icon-set.js';

export class IconsLarge extends IconsetSVG {
    public constructor() {
        super();
        this.name = 'custom-icons'; // default iconset name for these icons
    }

    protected renderDefaultContent(): TemplateResult {
        return CustomIconSet;
    }
}