code: @Override
      public Map<URI, MatchResult> findServicesProducingSome(Set<URI> outputTypes) {
          return findServicesProducingSome(outputTypes, LogicConceptMatchType.Plugin);
      }
docs: Discover registered services that produce some (i.e., at least one) of the types of output provided. That is, all
  those for which at least one output can be matched to the output types provided.
  
  @param outputTypes the types of output to be produced
  @return a Set containing all the matching services. If there are no solutions, the Set should be empty, not null.