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- class Foo
- attr_accessor_with_history :bar
- end
- f = Foo.new # => #<Foo:0x127e678>
- f.bar = 3 # => 3
- f.bar = :wowzo # => :wowzo
- f.bar = 'boo!' # => 'boo!'
- f.history(:bar) # => [3, :wowzo, 'boo!']
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