Custom Element Error (bo.get is not a function)

Developers Modeler
1

I have issue in custom element basically i added multiple custom element , then add properties panel every thing fine .

But when when put custom element in panel there are error display on browser console :
Uncaught TypeError: bo.get is not a function

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CustomElementFactory

this.create = function(elementType, attrs) {
var type = attrs.type;

if (elementType === 'label') {
  return self.baseCreate(elementType, assign({ type: 'label' }, DEFAULT_LABEL_SIZE, attrs));
}

// add type to businessObject if custom
if (/^custom:/.test(type)) {
  if (!attrs.businessObject) {
    attrs.businessObject = {
      type: type
    };

    if (attrs.id) {
      assign(attrs.businessObject, {
        id: attrs.id
      });
    }
  }

  // add width and height if shape
  if (!/:connection$/.test(type)) {
    assign(attrs, self._getCustomElementSize(type));
  }

  if (!('$instanceOf' in attrs.businessObject)) {
    // ensure we can use ModelUtil#is for type checks
    Object.defineProperty(attrs.businessObject, '$instanceOf', {
      value: function(type) {
        return this.type === type;
      }
    });
  }
  console.log("## ## elementType "+elementType);
  console.log("## ## attrs "+JSON.stringify(attrs));
  return self.baseCreate(elementType, attrs);
}

  
return self.createBpmnElement(elementType, attrs);

};

for custom element i use the same implementation for :

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