Authority contains configuration for an xDS control plane authority.

Locality represents the location of the xDS client application.

Node represents the identity of the xDS client, allowing management servers to identify the source of xDS requests.

ServerConfig holds settings for connecting to an xDS management server.

Stream provides methods to send and receive messages on a stream.

Transport provides the functionality to communicate with an xDS server using streaming calls.

TransportBuilder provides the functionality to create a communication channel to an xDS management server.