code: public <T extends Sink> void addSinkType(String typeName, Class<T> sinkClass) {
          LOG.info("Adding sinkType: " + typeName + " -> " + sinkClass.getCanonicalName());
          
          Multibinder<TypeHolder> bindings
              = Multibinder.newSetBinder(binder(), TypeHolder.class);
          bindings.addBinding().toInstance(new TypeHolder(typeName, sinkClass));
      }
docs: Add a sink implementation to Suro.  typeName is the expected value of the
  'type' field of a JSON configuration.
  
  @param typeName
  @param sinkClass