libandroid-navigation/src/main/java/com/mapbox/services/android/navigation/v5/navigation/NavigationService.java
@Override
  public void onCheckFasterRoute(Location location, RouteProgress routeProgress, boolean checkFasterRoute) {
    if (checkFasterRoute) {
      routeEngine.fetchRoute(location, routeProgress);
    }
  }
/**
   * Callback from the {@link NavigationEngine} - if fired with checkFasterRoute set
   * to true, a new {@link DirectionsRoute} should be fetched with {@link RouteEngine}.
   *
   * @param location         to create a new origin
   * @param routeProgress    for various {@link com.mapbox.api.directions.v5.models.LegStep} data
   * @param checkFasterRoute true if should check for faster route, false otherwise
   */
Callback from the  NavigationEngine - if fired with checkFasterRoute set
to true, a new  DirectionsRoute should be fetched with  RouteEngine.

@param location         to create a new origin
@param routeProgress    for various  com.mapbox.api.directions.v5.models.LegStep data
@param checkFasterRoute true if should check for faster route, false otherwise
Callback from the NavigationEngine - if fired with checkFasterRoute set to true a new DirectionsRoute should be fetched with RouteEngine . @param location to create a new origin @param routeProgress for various com . mapbox . api . directions . v5 . models . LegStep data @param checkFasterRoute true if should check for faster route false otherwise
@Override
  public void onCheckFasterRoute(Location location, RouteProgress routeProgress, boolean checkFasterRoute) {
    if (checkFasterRoute) {
      routeEngine.fetchRoute(location, routeProgress);
    }
  }
@ Override public void onCheckFasterRoute ( Location location , RouteProgress routeProgress , boolean checkFasterRoute ) { if ( checkFasterRoute ) { routeEngine . fetchRoute ( location , routeProgress ) ; } }
Callback from the {@link NavigationEngine} - if fired with checkFasterRoute set
 to true, a new {@link DirectionsRoute} should be fetched with {@link RouteEngine}.
Callback from the { @link NavigationEngine } - if fired with checkFasterRoute set to true a new { @link DirectionsRoute } should be fetched with { @link RouteEngine } .