Extractors { public static AllChannelMapExtractor allChannelMapExtractor(Set<String> channels){ return new AllChannelMapExtractor(channels); } private  Extractors(); static AllChannelMapExtractor allChannelMapExtractor(Set<String> channels); static ChannelMapExtractor channelMapExtractor(Map<Supplier, String> mapping); static ChannelMapExtractor channelMapExtractor(Collection<Supplier> channels); static ChannelMapExtractor channelMapExtractor(Supplier... channels);  }
@Test public void allChannelMapExtractor() { assertNotNull(Extractors.allChannelMapExtractor(new HashSet<>())); }