from this [example](https://svelte-headless-table.bryanmylee.com/docs/plugins/add-sub-rows#children-string-item-item) > The id of a sub-row is in the format {parentId}>{id}. but the problem is when i set rowDataId in ``` table.createViewModel(columns, { rowDataId: (row) => row.id }); ``` it return index instead of the data.id 
from this example
but the problem is when i set rowDataId in
it return index instead of the data.id
