libandroid-navigation-ui/src/main/java/com/mapbox/services/android/navigation/ui/v5/NavigationViewModel.java
private void deactivateInstructionPlayer() {
    if (instructionPlayer != null) {
      instructionPlayer.onDestroy();
    }
  }
/**
   * Destroys the {@link InstructionPlayer} if not null
   */
Destroys the  InstructionPlayer if not null
Destroys the InstructionPlayer if not null
private void deactivateInstructionPlayer() {
    if (instructionPlayer != null) {
      instructionPlayer.onDestroy();
    }
  }
private void deactivateInstructionPlayer ( ) { if ( instructionPlayer != null ) { instructionPlayer . onDestroy ( ) ; } }
Destroys the {@link InstructionPlayer} if not null
Destroys the { @link InstructionPlayer } if not null