Inheritance
Child_Contract -> Immediate_Base_Contracts [Not_Immediate_Base_Contracts]
+ I

+ VendingMachine
 -> I

+ A

+ B
 -> A

+ ContractArgCustomError


Base_Contract -> Immediate_Child_Contracts
 [Not_Immediate_Child_Contracts]

+ I
 -> VendingMachine

+ VendingMachine

+ A
 -> B

+ B

+ ContractArgCustomError

