docs: @Pure
  	public static SREBootstrap getBootstrap() {
  		synchronized (SRE.class) {
  			if (currentSRE == null) {
  				final Iterator<SREBootstrap> iterator = getServiceLoader().iterator();
  				if (iterator.hasNext()) {
  					currentSRE = iterator.next();
  				} else {
  					currentSRE = new VoidSREBootstrap();
  				}
  			}
  			return currentSRE;
  		}
  	}