title: Typescript interface with constructor - how to implement?
body: <p>I am trying to use angular maps library that exposes below interface
  <a href="https://angular-maps.com/api-docs/agm-core/interfaces/LatLng.html#source" rel="nofollow noreferrer">https://angular-maps.com/api-docs/agm-core/interfaces/LatLng.html#source</a></p>
  
  <pre><code>export interface LatLng {
    constructor(lat: number, lng: number): void;
    lat(): number;
    lng(): number;
  }
  </code></pre>
  
  <p>I need to construct an object of the same to use an API. <strong>How can I implement this interface?</strong></p>