src/Forms/ReviewContentHandler.php
public function canSubmitReview($record)
    {
        if (!$record->canEdit()
            || !$record->hasMethod('canBeReviewedBy')
            || !$record->canBeReviewedBy(Security::getCurrentUser())
        ) {
            return false;
        }
        return true;
    }
public function canSubmitReview($record)
    {
        if (!$record->canEdit()
            || !$record->hasMethod('canBeReviewedBy')
            || !$record->canBeReviewedBy(Security::getCurrentUser())
        ) {
            return false;
        }
        return true;
    }
Determine whether the user can submit a review

@param DataObject $record
@return bool