void set_hide( int flag );
Sets the hidden flag of an object to `flag', which should be 0 or 1 (hide disable, or hide enable, respectively). Only objects for which `master()->valid_hide(ob)' returns true may make themselves hidden. When the object is hidden, only other hidable objects will be able to find the object with find_object(), or multiple-object returning efuns such as users(), children(), all_inventory(), etc.
See also: valid_hide
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