populating a TreeStore in reverse order

[The Saltydog <thesaltydog gmail com>]

I need to populate a TreeStore from a flow of data coming from a pipe.
Each line of data will also have an associated "depth" value so that I
can understand the depth in the tree.

Populating the TreeStore would not be a problem, but the data is
arriving in the pipe in reverse-order. Can I populate a TreeStore
starting from the bottom? I had a look at documentation, but it seems
not to be possible..