gtk:tree-model-sort-convert-path-to-child-path (model path)

model -- a gtk:tree-model-sort object
path -- a gtk:tree-path instance to convert

A gtk:tree-path instance, or nil.

Converts path to a path on the child model of model. That is, path points to a location in model. The returned path will point to the same location in the model not being sorted. If path does not point to a location in the child model, nil is returned.