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module A
def foo1; end
end
class Klass
include A
end
module B
def foo2; end
end
module A
include B
def foo3; end
end
p Klass.instance_methods.include? :foo2
#has foo1 and foo3, but not foo2
class Klass2
include A
end
p Klass2.instance_methods.include? :foo2
#has foo1, foo2, and foo3
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