templates/docjson/publish.js
function genEntityDescription(data, kind, entityName) {
    return data({kind: kind, name: entityName}).select('description').join('\n\n');
}
function genEntityDescription(data, kind, entityName) {
    return data({kind: kind, name: entityName}).select('description').join('\n\n');
}
Generates description for a bem entity by merging
doclets descriptions from all levels