get itemURL()
    {
        return "indexedDB://" + this._databaseId.securityOrigin + "/" + this._databaseId.name + "/" + this._objectStore.name;
    }
@constructor
@extends {WebInspector.BaseStorageTreeElement}
@param {!WebInspector.ResourcesPanel} storagePanel
@param {!WebInspector.IndexedDBModel} model
@param {!WebInspector.IndexedDBModel.DatabaseId} databaseId
@param {!WebInspector.IndexedDBModel.ObjectStore} objectStore