apply {
        if (tag == null) {
          if (tags.isNotEmpty()) {
            (tags as MutableMap).remove(type)
          }
        } else {
          val mutableTags =
            when {
              tags.isEmpty() -> mutableMapOf<KClass<*>, Any>().also { tags = it }
              else -> tags as MutableMap<KClass<*>, Any>
            }
          mutableTags[type] = type.cast(tag)
        }
      }