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% start by loading the design pattern sample implementations:

| ?- logtalk_load(design_patterns('structural/proxy/loader')). ...

% first, lets create a old enough driver, no other than % Mr. Magoo itself (pedestrians be aware!):

| ?- driver::new(magoo, 'Mr. Magoo', 87).

yes

% in some of the cartoons, Mr. Magoo appears to be driving % a 1929 Packard Model 645 touring car; we can define the % car as a static object in the source file or create it % dynamically:

| ?- create_object(packard_645, [extends(car)], [], []).

yes

% then we check, using the proxy object, that the driver % can actually drive the car:

| ?- car_proxy(packard_645, magoo)::drive.

Car has been driven! yes

% now, lets create a driver that is just too young, one of % the children that Mr. Magoo sometimes babysits:

| ?- driver::new(wheeler, 'Wheeler', 7).

yes

% then we check, using the proxy object, that the child % is effectively not allowed to drive the car:

| ?- car_proxy(packard_645, wheeler)::drive.

Sorry, Wheeler is too young to drive! yes