code: public OrdinalSet getConnectionSet(String connectionModel, String nodeType, int ordinal, String propertyName) {
      	int connectionModelIndex = modelHolder.getModelIndex(connectionModel);
          return getConnectionSet(connectionModelIndex, nodeType, ordinal, propertyName);
      }
docs: Retrieve an {@link OrdinalSet} over all connected ordinals in a given connection model, given the type and ordinal of the originating node, and the property by which this node is connected.
  
  @return an {@link OrdinalSet} over all connected ordinals