code: @Override
      public Map<URI, MatchResult> findServicesClassifiedBySome(Set<URI> modelReferences) {
          return findServicesClassifiedBySome(modelReferences, LogicConceptMatchType.Plugin);
      }
docs: Discover the services that are classified by some (i.e., at least one) of the types given. That is, all those
  that have some level of matching with respect to at least one entity provided in the model references.
  
  @param modelReferences the classifications to match against
  @return a Set containing all the matching services. If there are no solutions, the Set should be empty, not null.