 suitable for processing a given message
 exchange at the layer and within the application context of the ClientAuthConfig.

 Each ClientAuthContext object is responsible for instantiating, initializing, and invoking the one or more
 ClientAuthModules encapsulated in the ClientAuthContext.

 <p>
 After having acquired a ClientAuthContext, a caller operates on the context to cause it to invoke the encapsulated
 ClientAuthModules to secure client requests and to validate server responses.</div>
<dl>
<dt><span