convert_path_to_child_path

Converts filter_path to a path on the child model of this.

That is, filter_path points to a location in this. The returned path will point to the same location in the model not being filtered. If filter_path does not point to a location in the child model, null is returned.

Parameters:

this	A TreeModelFilter.
filter_path	A TreePath to convert.

Returns:

A newly allocated TreePath, or null.