search: ParameterSearch
GtkVBox(toplevel):
  GtkHBox(hbox1, fill=True):
    GtkLabel(label8, fill=True): 'Filter:'
    GtkEntry(entry, expand=True, fill=True): 'city default'
    GtkButton(search_button, fill=True): 'gtk-find'
    GtkButton(show_all_button, fill=True): '_Show All'
  ObjectList(results, expand=True, fill=True):
    column: title='Group'
    column: title='Parameter', expand
    column: title='Current value'
    row: u'General', u'Default city', u'S\xe3o Carlos'
  GtkHButtonBox(hbuttonbox1, fill=True):
    GtkButton(edit_button): 'gtk-edit', insensitive
