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Showing help on 'isa()'
Syntax: isa(OBJ <object>, OBJ <parent>)isa(OBJ <object>, LIST <parent list> [, INT <return_parent>])
Returns true if <object> is a descendant of <parent>, otherwise false.
If a third argument is present and true, the return value will be the first parent that object1 descends from in the <parent list>.
isa(#2, $wiz) => 1
isa(#2, {$thing, $wiz, $container}) => 1
isa(#2, {$thing, $wiz, $container}, 1) => #57 (generic wizard)
isa(#2, {$thing, $room, $container}, 1) => #-1 <$nothing>