@Deprecated
  public FluoConfiguration addObserver(ObserverSpecification oconf) {
    int next = getNextObserverId();
    addObserver(oconf, next);
    return this;
  }
@ Deprecated public FluoConfiguration addObserver ( ObserverSpecification oconf ) { int next = getNextObserverId ( ) ; addObserver ( oconf , next ) ; return this ; }
Adds an {@link ObserverSpecification} to the configuration using a unique integer prefix that's
not currently in use.

@deprecated since 1.1.0. Replaced by {@link #setObserverProvider(String)} and
{@link #getObserverProvider()}