[float] [[breaking_70_low_level_restclient_changes]] === Low-level REST client changes [float] ==== Deprecated flavors of performRequest have been removed We deprecated the flavors of `performRequest` and `performRequestAsync` that do not take `Request` objects in 6.4.0 in favor of the flavors that take `Request` objects because those methods can be extended without breaking backwards compatibility. [float] ==== Removed setHosts We deprecated `setHosts` in 6.4.0 in favor of `setNodes` because it supports host metadata used by the `NodeSelector`.