fn total_issuance(ptoken_id: Self::AssetId) -> Self::Balance {
        if let Ok(underlying_id) = Self::underlying_id(ptoken_id) {
            Self::total_supply(underlying_id)
        } else {
            Balance::default()
        }
    }
/// The total amount of issuance in the system.
The total amount of issuance in the system.
The total amount of issuance in the system .
fn total_issuance(ptoken_id: Self::AssetId) -> Self::Balance {
        if let Ok(underlying_id) = Self::underlying_id(ptoken_id) {
            Self::total_supply(underlying_id)
        } else {
            Balance::default()
        }
    }
fn total_issuance ( ptoken_id : Self :: AssetId ) -> Self :: Balance { if let Ok ( underlying_id ) = Self :: underlying_id ( ptoken_id ) { Self :: total_supply ( underlying_id ) } else { Balance :: default ( ) } }
The total amount of issuance in the system.
The total amount of issuance in the system .
ptoken_id
Self::AssetId
ptoken_id
Self::AssetId