docs: public static boolean isFluxByteBuf(Type entityType) {
          if (TypeUtil.isTypeOrSubTypeOf(entityType, Flux.class)) {
              final Type innerType = TypeUtil.getTypeArguments(entityType)[0];
              if (TypeUtil.isTypeOrSubTypeOf(innerType, ByteBuf.class)) {
                  return true;
              }
          }
          return false;
      }