enum class RecyclerType constructor(val int: Int) {
  BODY(1),
  HEADER(2)
  FOOTER(3);

  companion object {
    // enumへの変換を行う
    fun fromInt(index: Int): RecyclerType {
      return values().firstOrNull { it.int == index } ?: BODY
    }
  }

  val isBody: Boolean
  get() = this == BODY

  val isFooter: Boolean
  get() = this == FOOTER
}

override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
  if(RecyclerType.fromInt(getItemViewType(position)).isBody){
    // 処理
  }
}

    fun fromInt(index: Int): RecyclerType {
      return values().first { it.int == index } 
    }