def popup(self, title, callfn, initialdir=None):
        super(DirectorySelection, self).popup(title, callfn, initialdir)
Get all headers
dataset/ETHPy150Open ejeschke/ginga/ginga/gtkw/GtkHelp.py/DirectorySelection.popup--crossover with--dataset/ETHPy150Open sysdream/pysqli/pysqli/core/context.py/Context.get_headers