Sentinel id used by withPagination's "Load more…" placeholder.
A single fixed id, which is also its limitation: TreeItem.id must be
unique across a whole tree, so only one level of one tree can show the
placeholder at a time. Paginating two sibling branches at once needs ids of
your own.
Sentinel id used by withPagination's "Load more…" placeholder.
A single fixed id, which is also its limitation:
TreeItem.idmust be unique across a whole tree, so only one level of one tree can show the placeholder at a time. Paginating two sibling branches at once needs ids of your own.