@Override public MutableSet<T> withAll(Iterable<? extends T> elements) { this.addAllIterable(elements); return this; }
@Override public MutableSet<T> withAll(Iterable<? extends T> elements) { this.addAllIterable(elements); return this; }
@Override public MutableSet<T> withAll(Iterable<? extends T> elements) { this.addAllIterable(elements); return this; }