Gtk.TreeView.prototype.get_cell_area

function get_cell_area(path:Gtk.TreePath, column:Gtk.TreeViewColumn):void {
    // Gjs wrapper for gtk_tree_view_get_cell_area()
}

Fills the bounding rectangle in bin_window coordinates for the cell at the row specified by path and the column specified by column. If path is null, or points to a path not currently displayed, the @y and @height fields of the rectangle will be filled with 0. If column is null, the @x and @width fields will be filled with 0. The sum of all cell rects does not cover the entire tree; there are extra pixels in between rows, for example. The returned rectangle is equivalent to the @cell_area passed to Gtk.CellRenderer.prototype.render. This function is only valid if tree_view is realized.