code: @SuppressWarnings("unchecked")
  	public static ChannelOperations.OnSetup channelOperationFactory(AbstractBootstrap<?, ?> b) {
  		Objects.requireNonNull(b, "bootstrap");
  		ChannelOperations.OnSetup ops =
  				(ChannelOperations.OnSetup) b.config()
  				                             .options()
  				                             .get(OPS_OPTION);
  		b.option(OPS_OPTION, null);
  		if (ops == null) {
  			return ChannelOperations.OnSetup.empty(); //will not be triggered in
  		}
  		return ops;
  	}
docs: Obtain and remove the current {@link ChannelOperations.OnSetup} from the bootstrap.
  
  @param b the bootstrap to scan
  
  @return current {@link ChannelOperations.OnSetup} factory or null