No Context in item-template of Collapsible widget

[anserwaseem]

Describe the bug
Use item-template in Collapsible widget. Example YAML

Collapsible:
  item-template:
    data: [1, 2, 3]
    name: p
    template:
      CollapsibleItem:
        key: ${p}
        label: ${'hello' + getDateLabel(p)}
        children:
          Text:
            text: ${'world' + p + ensemble.storage.get("iconName")}

Errors


fyi: getDateLabel is available in common.js script in kitchen-sink app