src/Table/Table/Columns.php
public function addContainer($name, $label = '', $attr = [])
    {
        $c = new Column\Container($name, $label, $attr);
        $this->addColumn($c);
        return $c;
    }
public function addContainer($name, $label = '', $attr = [])
    {
        $c = new Column\Container($name, $label, $attr);
        $this->addColumn($c);
        return $c;
    }
public function addContainer ( $ name , $ label = '' , $ attr = [ ] ) { $ c = new Column \ Container ( $ name , $ label , $ attr ) ; $ this -> addColumn ( $ c ) ; return $ c ; }
Add a container columns

@param $name
@param string $label
@param array $attr
@return \FrenchFrogs\Table\Column\Container
Add a container columns