How to use Elasticsearch service inside plugin?
I am developing an external plugin in Kibana 8.1.1 using React.
I want to retrieve data from ES at server side using the Elasticsearch service. I couldn't find any documentation or examples except for this (Elasticsearch service | Kibana Guide [8.8] | Elastic), which doesn't have any valuable information and moreover the link to the service given within is also wrong.
I looked into this example as well (https://github.com/elastic/kibana/tree/8fcd199d2a8f7368779552c659d34c0d34b9b87b/examples/search_examples), but it isn't using Elasticsearch service.
Kindly guide me with some resources and docs.