[attribute, context] = compile(attribute, context)

result = control__callback(callback, context)
result = struct;

control = control__create(attribute, context)
control = empty(control_create);

opt = control__options(context)
opt = struct;

attribute = create(context)
attribute = struct;

attribute = load(store, context)
attribute = struct;

handles = menu(par, attribute, context)
handles = [];

result = menu__callback(callback, context)
result = struct;

handles = menu__create(par, attribute, context)
handles = [];

attribute = model(context)
attribute = struct;

save(attribute, store, context)