chore(import): compute FlowNode#lanes

lib/import/BpmnTreeWalker.js

@@ -316,6 +316,8 @@ function BpmnTreeWalker(handler) {
     if (lane.childLaneSet) {
       handleLaneSet(lane.childLaneSet, newContext || context);
     }
+
+    wireFlowNodeRefs(lane);
   }
 
   function handleLaneSet(laneSet, context) {
@@ -383,6 +385,17 @@ function BpmnTreeWalker(handler) {
   }
 
 
+  function wireFlowNodeRefs(lane) {
+    // wire the virtual flowNodeRefs <-> relationship
+    forEach(lane.flowNodeRef, function(flowNode) {
+      var lanes = flowNode.get('lanes');
+
+      if (lanes) {
+        lanes.push(lane);
+      }
+    });
+  }
+
   ///// API ////////////////////////////////
 
   return {

test/spec/import/ModelWiringSpec.js

@@ -156,6 +156,19 @@ describe('import - model wiring', function() {
       expect(sequenceFlowElement.parent).to.eql(participantShape);
     }));
 
+
+    it('should wire FlowElement#lanes', inject(function(elementRegistry) {
+
+      // when
+      var taskShape = elementRegistry.get('Task'),
+          task = taskShape.businessObject,
+          laneShape = elementRegistry.get('Lane'),
+          lane = laneShape.businessObject;
+
+      // then
+      expect(task.get('lanes')).to.eql([ lane ]);
+    }));
+
   });