Validate a diagram

function BPMNProcess() {

// Parameters passed to the script:
  // Guid - may be the guid of a diagram or element
  // Repository

//Script to validate a BPMN Activity diagram.
//This implements rules which can not be checked using a Model Expert Reference Model.
//It can used instead of, or as well as, a Reference Model, which can check the simple stuff


     //*********** Required so that Model Expert knows what kind of things is being validated.
    //* valid values are Element or Diagram
    //* <Validation>Diagram</Validation> 

    //*********** Required so that Model Expert knows which element type/stereotype this is used for
    //* <Type>Business Process</Type> 'space is required here

    // Find the diagram
    let d = Repository.GetDiagramByGuid(Guid.toString())

    // Initialize outputHTML to hold the results from the script
    let outputHTML = "";

    // Check the contents of the diagram

    //* Rule 1 - diagram must have at least two Lanes

    let numberOfLanes = 0;
    if (d && d.DiagramObjects.Count > 0) {
        for (let i = 0; i < d.DiagramObjects.Count; i++) {
            let dObj = d.DiagramObjects.GetAt(i);

            // Get the element
            let e = Repository.GetElementByID(dObj.ElementID);
            if (e && e.MetaType === "BPMN2.0::Lane") {
                numberOfLanes = numberOfLanes + 1;

            }

       }

   }

    // Add violations
    if (numberOfLanes < 2 ) {
        outputHTML += "<DiagramViolation name='Diagram must have at least 2 Lanes' severity='7' diagramID = '" + d.DiagramID + "' subject='" + d.Name +  "' />";
    }


    // Return the HTML string
    return outputHTML;
}


// Call the function
 result = BPMNProcess();