setTrackingMode(mode) {
        const me = this;

        me._setTrackingMode(mode);
        return me;
    }
Sets the tracking mode.
@param {string} mode - Tracking mode: 'position', 'back', 'topback', 'front',
    'topfront', 'helicopter', 'drone', 'bird' or 'heading'
@returns {Map} Returns itself to allow for method chaining