code: @Override
  	public String getJwtSSOToken(Subject subject) {
  		// TODO Auto-generated method stub
  		String encodedjwtprincipal = null;
  		Set<JsonWebToken> jsonWebTokenPrincipalSet = getJwtPrincipals(subject);
  		if (jsonWebTokenPrincipalSet != null && !jsonWebTokenPrincipalSet.isEmpty()) {
  			if (hasMultiplePrincipals(jsonWebTokenPrincipalSet)) {
  				// TODO error
  			} else {
  				encodedjwtprincipal = convertToEncoded(jsonWebTokenPrincipalSet.iterator().next());
  			}
  		}
  		return encodedjwtprincipal;
  	}
docs: /*
  (non-Javadoc)
  
  @see
  com.ibm.ws.security.sso.cookie.JwtSSOToken#getJwtSSOToken(javax.security.
  auth.Subject)