Type Definition frame_support::traits::tokens::fungibles::DebtOf

type DebtOf<AccountId, B> = Imbalance<<B as Inspect<AccountId>>::AssetId, <B as Inspect<AccountId>>::Balance, <B as Balanced<AccountId>>::OnDropDebt, <B as Balanced<AccountId>>::OnDropCredit>;

Imbalance implying that the total_issuance value is less than the sum of all account balances.