Пример #1
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 def overbook(self):
     return field_value(self.context, "item_overbook")
Пример #2
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 def overbook(self):
     return field_value(self.context, 'item_overbook')
Пример #3
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 def available(self):
     return field_value(self.context, "item_available")
Пример #4
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 def available(self):
     return field_value(self.context, 'item_available')