//	Put Payment under a key: user account 
Put Payment under a key: user account
Put Payment under a key : user account
pub(super) fn insert_payment(
        index: PaymentIndex, 
        who: &T::AccountId, 
        balance: &BalanceOf<T>
    ) {
        let id = Self::id_from_index(&index);
        who.using_encoded(|b| child::put(&id, b, &balance));
    }
pub ( super ) fn insert_payment ( index : PaymentIndex , who : & T :: AccountId , balance : & BalanceOf < T > ) { let id = Self :: id_from_index ( & index ) ; who . using_encoded ( | b | child :: put ( & id , b , & balance ) ) ; }
Put Payment under a key: user account
Put Payment under a key : user account
index
PaymentIndex
who
&T::AccountId
balance
&BalanceOf<T>