libandroid-navigation-ui/src/main/java/com/mapbox/services/android/navigation/ui/v5/voice/polly/PollyPlayer.java
@Override
  public void play(String instruction) {
    if (!isMuted && !TextUtils.isEmpty(instruction)) {
      executeInstructionTask(instruction);
    }
  }
/**
   * @param instruction voice instruction to be synthesized and played.
   */
@param instruction voice instruction to be synthesized and played.
@param instruction voice instruction to be synthesized and played .
@Override
  public void play(String instruction) {
    if (!isMuted && !TextUtils.isEmpty(instruction)) {
      executeInstructionTask(instruction);
    }
  }
@ Override public void play ( String instruction ) { if ( ! isMuted && ! TextUtils . isEmpty ( instruction ) ) { executeInstructionTask ( instruction ) ; } }
@param instruction voice instruction to be synthesized and played.
@param instruction voice instruction to be synthesized and played .