# src/Util/ID/ID.js

    export default class ID {
      constructor (user, clock) {
        this.user = user // TODO: rename to client
        this.clock = clock
      }
      clone () {
        return new ID(this.user, this.clock)
      }
      equals (id) {
        return id !== null && id.user === this.user && id.clock === this.clock
      }
      lessThan (id) {
        if (id.constructor === ID) {
          return this.user < id.user || (this.user === id.user && this.clock < id.clock)
        } else {
          return false
        }
      }
    }