public function callbackCustomData($value, $raw) {
        $defaultKeys = ['id','slugs','data','type','href','tags','lang','alternate_languages','linked_documents','first_publication_date','last_publication_date'];
        foreach($raw as $key => $value) {
            if(in_array($key, $defaultKeys)) {
                unset($raw[$key]);
            }
        }
        return $raw;
    }
public function callbackCustomData($value, $raw) {
        $defaultKeys = ['id','slugs','data','type','href','tags','lang','alternate_languages','linked_documents','first_publication_date','last_publication_date'];
        foreach($raw as $key => $value) {
            if(in_array($key, $defaultKeys)) {
                unset($raw[$key]);
            }
        }
        return $raw;
    }
public function callbackCustomData ( $ value , $ raw ) { $ defaultKeys = [ 'id' , 'slugs' , 'data' , 'type' , 'href' , 'tags' , 'lang' , 'alternate_languages' , 'linked_documents' , 'first_publication_date' , 'last_publication_date' ] ; foreach ( $ raw as $ key => $ value ) { if ( in_array ( $ key , $ defaultKeys ) ) { unset ( $ raw [ $ key ] ) ; } } return $ raw ; }
Return all the values that are not default in Prismic

@param $value
@param $raw
@return mixed
Return all the values that are not default in Prismic