Namespace List
Here is a list of all documented namespaces with brief descriptions:

Sap4HanaRestClient | Sap4HanaRestClient namespace contains all the objects in the Sap4HanaRestClient module
Sap4HanaRestClient | This class provides the REST client API for communication with SAP S/4Hana servers
Sap4HanaRestConnection | Class for SAP S/4Hana REST connections; returns Sap4HanaRestClient::Sap4HanaRestClient objects