Adapters.BOOLEAN.optional(defaultValue = false),
      extensionValue,
      decompose = {
        listOf(
          it.id,
          it.critical,
          it.value,
        )
      },
      construct = {
        Extension(
          id = it[0] as String,
          critical = it[1] as Boolean,
          value = it[2],
        )
      },
    )

  /**
   * ```