Contains Challengereturntrue if the RSTR contains a SignChallenge/BinaryExchange or some other custom challenge recognized by this implementation.
Create an RSTR for a client initiated IssuedTokenContext establishment, for example a Client Initiated WS-SecureConversation context.
Return the <wst:ComputedKey> URI if any inside the RSTR, null otherwise
Handle an RSTR returned by the Issuer and update Token information into the IssuedTokenContext.
Handle an RSTR returned by the Issuer and Respond to the Challenge