theme-lib/lib/services/js-themes/theme.options.d.ts

This is a simple example Angular Library published to npm.

export interface NbJSThemeOptions {
    name: string;
    base?: string;
    variables?: NbJSThemeVariable;
}
export interface NbJSThemeVariable {
    [key: string]: string | string[] | NbJSThemeVariable;
}