code: public boolean removeGuarded(Guarded toRemove) {
          Object mask = this.guardedEntries.remove(toRemove);
          return mask != null;
      }
docs: Removes the guarded object from the management of this FormGuard.
  
  @param toRemove
  object that no longer should be managed
  
  @return <code>false</code> if the object toRemove was not present in the list of managed guarded objects.