_docMatchesKeywords_USER(doc, filter) {
        if (!doc.responsibles) { return false; }
        let respStr = doc.responsibles.reduce((acc, resp) => { return acc + resp; }, '');
        return ( (filter.ids && _.intersection(doc.responsibles, filter.ids).length > 0)
                    || (filter.value && this._toUpper(respStr).indexOf(this._toUpper(filter.value)) !== -1) );