We need a filter so that users can view instances where any of the given flow nodes have been cancelled. API proposal:

{
  type: "canceledFlowNodes", 
  data: {
    "values" : [ "flownode_id", "flownode2_id" ]
  }
}
// will include all process instances where ANY of the flownodes was canceled or interrupted

ATs:

• Users can filter for instances whereby any the given flow nodes have been cancelled
• This also works for reports that use event based processes
• REST API documentation updated