@codebakery/origami/styles/src/shadycss/models.d.ts

Angular + Polymer

export interface ShadyCSS {
    nativeCss: boolean;
    nativeShadow: boolean;
    CustomStyleInterface?: {
        addCustomStyle(style: HTMLStyleElement): void;
    };
    flushCustomStyles(): void;
}
declare global {
    interface Window {
        ShadyCSS: ShadyCSS;
    }
}