New constructor for MultiScrubber that would take a collection of Scrubber

[murdos]

Current constructor for MultiScrubber is not very easy to use.

Adding a new one could ease things:

public MultiScrubber(Collection<Scrubber> scrubbers) { 
  // ...
}

Or even:

public MultiScrubber(Scrubber... scrubbers) { 
  // ...
}

[LarsEckart]

Agreed, we made the change, will be in the next release.