docs: public void setThreadPoolSize( int threads ) {
  		if( threads <= 0 )
  			throw new IllegalArgumentException("Number of threads must be greater than 0");
  		if( verbose )
  			Log.i(TAG,"setThreadPoolSize("+threads+")");
  
  		threadPool.setCorePoolSize(threads);
  		threadPool.setMaximumPoolSize(threads);
  	}