[BUG] High Level Rest Client Docs

What is the bug?

The docs say
The OpenSearch Java high-level REST client lets you interact with your OpenSearch clusters and indexes through Java methods and data structures rather than HTTP methods and JSON.

But isn't the point of the rest client to use http methods with json?

Also i'm confused on this warning

The OpenSearch Java high-level REST client will be deprecated starting with OpenSearch version 3.0.0 and will be removed in a future release. We recommend switching to the [Java client](https://opensearch.org/docs/2.8/clients/java/) instead.

Does the java client have a way to make rest calls where you can pass in json, or is the ability to make rest calls to opensearch blocked after v3?

Will there still be a low level rest client exposed somewhere something similar to https://www.elastic.co/guide/en/elasticsearch/client/java-api-client/current/java-rest-low-usage-initialization.html ?

Start by reviewing the quoted High Level REST Client documentation and the linked Java client documentation, then verify what each client supports for HTTP methods, JSON requests, and low-level REST calls. Done means the documentation clearly explains the deprecation warning, the Java client's REST capabilities, and whether a low-level REST client remains available after version 3.0.0.