code: @Override
  	public boolean isSubjectValid(Subject subject) {
  		// TODO Auto-generated method stub
  		String encodedjwt = getJwtSSOToken(subject);
  		JwtSsoTokenUtils tokenUtil = getJwtSsoTokenConsumerUtils();
  		if (tokenUtil != null && encodedjwt != null) {
  			return tokenUtil.isJwtValid(encodedjwt);
  		}
  		return false;
  	}
docs: /*
  (non-Javadoc)
  
  @see
  com.ibm.ws.security.jwt.sso.token.utils.JwtSSOToken#isJwtSSOTokenValid(
  javax.security.auth.Subject)