pub trait Mutate<AccountId>: Inspect<AccountId> {
// Required methods
fn approve(
asset: Self::AssetId,
owner: &AccountId,
delegate: &AccountId,
amount: Self::Balance
) -> DispatchResult;
fn transfer_from(
asset: Self::AssetId,
owner: &AccountId,
delegate: &AccountId,
dest: &AccountId,
amount: Self::Balance
) -> DispatchResult;
}