[Explore feature ref](https://grafana.com/docs/grafana/latest/explore/logs-integration/#highlight-searched-words) Some pointers: - [search words added in dataframe for loki source](https://github.com/grafana/grafana/blob/0f25f1873955c43875fa786e35571008e9714157/public/app/plugins/datasource/loki/backendResultTransformer.ts#L42) - [search words in elasticsearch source](https://github.com/grafana/grafana/blob/0f25f1873955c43875fa786e35571008e9714157/public/app/plugins/datasource/elasticsearch/ElasticResponse.ts#L542-L567) - [lucene query parser](https://github.com/grafana/grafana/blob/0f25f1873955c43875fa786e35571008e9714157/public/app/plugins/datasource/elasticsearch/modifyQuery.ts)
