code: public void clickOnButton(int index) {
  		if(config.commandLogging){
  			Log.d(config.commandLoggingTag, "clickOnButton("+index+")");
  		}
  		
  		clicker.clickOn(Button.class, index);
  	}
docs: Clicks a Button matching the specified index.
  
  @param index the index of the {@link Button} to click. {@code 0} if only one is available