jBPM Console Process Diagram adds an out-of-place marker in case of Swimlane

If a node is inside a Swimlane, 'Diagram' button for process instance displays png image with a marker but it's not correctly placed on the active node. See attached swimlane-marker.png.

Node's x/y values (<bpmndi:BPMNShape>) in bpmn file are relative position to Swimlane position but the parser (org.jbpm.bpmn2.xml.di.BPMNPlaneHandler) doesn't take into account it.

Probably, possible fixes would be:

A) Calculate and store Node's x/y values as absolute position at parsing time

or

B) Store Swimlane's x/y values at parsing time and calculate Node's absolute position at rendering time (org.jbpm.integration.console.graph.GraphViewerPluginImpl)