CakePHP3でCSV出力

#####現状のコード

PHP
1//CSV出力（コントローラー側）
2if($this->request->query('csv') === 'true'){
3			//$this->render('CsvView');
4			$table = $this->paginate($query);
5			$_serialize = 'table';
6			$_extract = 
7['id','dbo01','dbodata02.name','dbodata03.name','dbo04','dbo05','dbodata06.name','dbo07','dbodata08.name','dbo09','dbo10','dbodata11.name','dbodata12.name','dbo13','dbo14','dbo15','dbo59','dbo16','dbo17','dbo18','dbo19',$this->Functions->_csvExportCheckBox('dbodata20s','dbodata20s.name'),'dbo21','dbo22','dbo23','dbo24','dbo25','dbodata26.name','dbo27','dbodata28.name',$this->Functions->_csvExportCheckBox('dbodata29s','dbodata29s.name'),'dbo30',$this->Functions->_csvExportCheckBox('dbodata31s','dbodata31s.name'),'dbo32','dbo33',$this->Functions->_csvExportCheckBox('dbodata34s','dbodata34s.name'),'dbo35','dbodata36.name','dbodata37.name','dbodata38.name','dbo39','dbo40','dbodata41.name','dbo42','dbo43','dbo44','dbo45','dbo46','dbo47','dbo48','dbo49','dbo50',$this->Functions->_csvExportCheckBox('dbodata51s','dbodata51s.name'),'dbodata52.name',$this->Functions->_csvExportCheckBox('dbodata53s','dbodata53s.name'),'dbodata54.name','dbo55','dbo56','dbo57','dbodata58.name','lat','lng','author','datetime','status'
8		];
9			//Windows対応
10			$_extension = 'mbstring';
11			$_dataEncoding = 'UTF-8';
12			$_csvEncoding = 'sjis-win';
13			$_newline = "\r\n";
14			$_eol = "\r\n";
15			$this->response->download('テスト.csv');
16			$this->viewBuilder()->className('CsvView.Csv');
17			$this->set(compact('table', '_serialize', '_extension', '_dataEncoding','_csvEncoding', '_newline', '_eol','_extract'));
18		}
19
20//FunctionsComponent.php
21public function _csvExportCheckbox($row,$columnName,$dataName){
22		$results = [];
23		foreach($row[$dataName] as $key => $value){
24			$results[] = $row[$dataName][$key]['name'];
25		}
26		$resultStr = implode(';',$results);
27		$row = array_merge($row,[$columnName => $resultStr]);
28		return $row[$columnName];
29	}

#####知りたいこと
今まで以下のように、チェックボックスは1つ1つ関数で処理していました。
これだと冗長過ぎるので関数を作成し対応しようと試みています。
しかし、$rowがないよと。エラーが出てしまいます。

$rowはどうやったらFunctionsComponentに渡せますか？
プラグインはCsvViewを利用してしています。

PHP
1function ($row) {
2								$results = [];
3								foreach($row['dbodata20s'] as $key => $value){
4									$results[] = $row['dbodata20s'][$key]['name'];
5								}
6								$resultStr = implode(';',$results);
7								$row = array_merge($row,['dbodata20s.name' => $resultStr]);
8								return $row['dbodata20s.name'];
9							}