+ extended handling of system and mtc compnents and their constituents

			if (reference !== null) {

				list.addAll(reference.scopeReferencedFields)

			}

		} else if (pRef.component.system !== null ||

		    pRef.component.mtc !== null) {

		    //extension for references to system ports

		    //TODO: filter for types actually used as system? 

		    val module = pRef.findDesiredParent(TTCN3Module)

            for (ComponentDef ct : module.eAllOfType(ComponentDef)) {

                list.addAll(ct.scopeReferencedFields)

            }

    	    synchronized (IMPORTS) {

                if (IMPORTS.containsKey(module.eResource)) {

                    val imported = IMPORTS.get(module.eResource)

                    for (i : 0 .. imported.size - 1) {

                        val d = imported.get(i)

                        for (o : d.exportedObjects) {

                            if (TTCN3Package.eINSTANCE.fieldReference.isAssignableFrom(ComponentDef.newInstance.eClass)) {

                                list.add(o.EObjectOrProxy)

                            }

                        }

                    }

                }

            }

		}

		scopeFor(list, pRef.scope_communicationPort)

	}