public function export_csv(Devis $devis, Table $table)
{
//dd();
\Excel::create($table->name, function ($excel) use($table) {
$excel->sheet('Sheetname', function ($sheet) use($table) {
$columns = DB::connection()->getDoctrineSchemaManager()->listTableColumns($table->tableName);
$classname = $table->modelNamespaceClass();
// $columns = collect($columns);
//$data = $table->getColumns(); // As of PHP 5.3.0
// $data = $classname::all(); // As of PHP 5.3.0
$sheet->fromModel($columns);
});
})->download('csv');
}