https://github.com/reactor/reactor-core: Non-Blocking Reactive Foundation for the JVM (reactor)
  • Stephane Maldini
  • David Karnok
  • Simon Baslé
  • Sergei Egorov
  • Sébastien Deleuze 
package reactor.core.scheduler;

import reactor.core.Disposable;

import java.util.Collection;

final class EmptyCompositeDisposable implements Disposable.Composite {

    @Override
    public boolean add(Disposable d) {
        return false;
    }

    @Override
    public boolean addAll(Collection<? extends Disposable> ds) {
        return false;
    }

    @Override
    public boolean remove(Disposable d) {
        return false;
    }

    @Override
    public int size() {
        return 0;
    }

    @Override
    public void dispose() {
    }

    @Override
    public boolean isDisposed() {
        return false;
    }

}