Set the theme that will be applied to the created Efl.Ui.Layout objects. See Efl.Ui.Layout_Base.theme for more details.
theme_config { params { @in klass: string; @in group: string; @in style: string; } }
void efl_ui_layout_factory_theme_config(Eo *obj, const char *klass, const char *group, const char *style);