In the InheritanceManagercontract there is no normal way to deposit ETH to the contract even though it's clear that the contract should manage ETH.
Because there is not a deposit, receive, or fallbackfunction there is no normal way to deposit ETH to the InheritanceManagercontract making it harder to receive ETH. Using the selfdestructfunction is not optimal for depositing funds to the contract and is probably not what is intended.
Manual code review
Add a receivefunction to the contract:
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