src/Models/BaseBitrixModel.php
public function update(array $fields = [])
    {
        $keys = [];
        foreach ($fields as $key => $value) {
            array_set($this->fields, $key, $value);
            $keys[] = $key;
        }

        return $this->save($keys);
    }
public function update(array $fields = [])
    {
        $keys = [];
        foreach ($fields as $key => $value) {
            array_set($this->fields, $key, $value);
            $keys[] = $key;
        }

        return $this->save($keys);
    }
Update model.

@param array $fields

@return bool