Block/System/Config/Form/Field/Checkbox.php
public function getCheckedValues()
    {
        if ($this->values === null) {
            $data = $this->config->getImageOptimizationRatios();
            if (!isset($data)) {
                $data = '';
            }
            $this->values = explode(',', $data);
        }
        return $this->values;
    }
public function getCheckedValues()
    {
        if ($this->values === null) {
            $data = $this->config->getImageOptimizationRatios();
            if (!isset($data)) {
                $data = '';
            }
            $this->values = explode(',', $data);
        }
        return $this->values;
    }
public function getCheckedValues ( ) { if ( $ this -> values === null ) { $ data = $ this -> config -> getImageOptimizationRatios ( ) ; if ( ! isset ( $ data ) ) { $ data = '' ; } $ this -> values = explode ( ',' , $ data ) ; } return $ this -> values ; }
Get checked values

@return array|null
Get checked values