Illuminate\Database\Eloquent\Builder::find PHP Метод

    public function find($id, $columns = ['*'])
    {
        if (is_array($id)) {
            return $this->findMany($id, $columns);
        }
        return $this->whereKey($id)->first($columns);
    }

 /**
  * Update an item
  *
  * @param integer $id
  * @param array   $data
  * @return mixed
  */
 public function update($id, array $data)
 {
     $item = $this->builder->find($id);
     $item->update($data);
     // Reset the query builder
     $this->newBuilder();
     return $item;
 }