Method List
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#available_change Machine
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cash_value Cash
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#cash_value Product
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cash_values Cash
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#change Top Level Namespace
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#initialize Product
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#initialize Machine
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#name Product
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#price Product
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#products Machine
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#products Top Level Namespace
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#refill_cash Machine
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#refill_products Machine
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#select_product Machine
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string_value Cash
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string_values Cash
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valid_coins Cash