code: public static RythmConfiguration get() {
          RythmEngine engine = RythmEngine.get();
          return null != engine ? engine.conf() : EMPTY_CONF;
      }
docs: Return <tt>RythmConfiguration</tt> instance of current RythmEngine, or
  if it is not inside a RythmEngine runtime context, an {@link #EMPTY_CONF empty configuration}
  is returned
  
  @return the configuration instance associated with engine running in the current thread