Method List
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#base_gtin14 Barkick::GTIN
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#book? Barkick::GTIN
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#check_digit Barkick::GTIN
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check_digit Barkick::GTIN
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#country_code Barkick::GTIN
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#gtin12 Barkick::GTIN
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#gtin13 Barkick::GTIN
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#gtin14 Barkick::GTIN
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#initialize Barkick::GTIN
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#prefix Barkick::GTIN
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#prefix_name Barkick::GTIN
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#price Barkick::GTIN
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#restricted? Barkick::GTIN
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#valid? Barkick::GTIN
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#variable? Barkick::GTIN