OpenSearch/docs/reference/migration/migrate_7_0/restclient.asciidoc

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[[breaking_70_restclient_changes]]
=== High-level REST client changes
==== API methods accepting `Header` argument have been removed
All API methods accepting headers as a `Header` varargs argument, deprecated
since 6.4, have been removed in favour of the newly introduced methods that
accept instead a `RequestOptions` argument. In case you are not specifying any
header, e.g. `client.index(indexRequest)` becomes
`client.index(indexRequest, RequestOptions.DEFAULT)`.
In case you are specifying headers
e.g. `client.index(indexRequest, new Header("name" "value"))` becomes
`client.index(indexRequest, RequestOptions.DEFAULT.toBuilder().addHeader("name", "value").build());`