lock">Get a ServerAuthContext instance from this ServerAuthConfig.

 <p>
 The implementation of this method returns a ServerAuthContext instance that encapsulates the ServerAuthModules used
 to validate requests and secure responses associated with the given <i>authContextID</i>.

 <p>
 Specifically, this method accesses this ServerAuthConfig object with the argument <i>authContextID</i> to determine
 the ServerAuthModules that are to be encapsulated in the returned ServerAuthContext instance.
 
 <P>
 The S