Support for Initiating and not initiating message flows

I can’t find how to make an “initiating” or a “Non-initiating” message flow in the Camunda modeler. Is that supported or not?

message flow 1 Message Flow

message flow 2 Initiating Message Flow with Decorator

message flow 3 Non-Initiating Message Flow with Decorator

Only the generic message flow is supported by the modeler.