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foo:
    class: Foo
    args:
        bar: { $ref: bar }
bar:
    class: Bar
    args:
        text: "Hello, World"
buzz:
    class: Buzz
    args:
        - [ 'one', 'two', 'three' ]

fizz:
    class: Fizz
    args:
        href: { one: 'two' }
fizzbuzz:
    class: Buzz
    args: "Hello"