getConfiguration() {
    goog.asserts.assert(this.config_, 'Config must not be null!');

    const ret = this.defaultConfig_();
    shaka.util.PlayerConfiguration.mergeConfigObjects(
        ret, this.config_, this.defaultConfig_());
    return ret;
  }
Return a copy of the current configuration.  Modifications of the returned
value will not affect the Player's active configuration.  You must call
<code>player.configure()</code> to make changes.

@return {shaka.extern.PlayerConfiguration}
@export