code: @Nonnull
    public static ICommonsList <IAuthToken> getAllTokensOfSubject (@Nonnull final IAuthSubject aSubject)
    {
      ValueEnforcer.notNull (aSubject, "Subject");
  
      return s_aRWLock.readLocked ( () -> CommonsArrayList.createFiltered (s_aMap.values (),
                                                                           aToken -> aToken.getIdentification ()
                                                                                           .hasAuthSubject (aSubject)));
    }
docs: Get all tokens of the specified auth subject. All tokens are returned, no
  matter whether they are expired or not.
  
  @param aSubject
  The subject to query. May not be <code>null</code>.
  @return The list and never <code>null</code>.