pub trait CallbackProxy: CallbackProxyObjBase + Sized {
// Provided methods
fn default_issue_cb(
self,
initial_caller: ManagedAddress<Self::Api>,
storage_key: ManagedBuffer<Self::Api>
) -> CallbackClosure<Self::Api> { ... }
fn default_issue_init_supply_cb(
self,
initial_caller: ManagedAddress<Self::Api>,
storage_key: ManagedBuffer<Self::Api>
) -> CallbackClosure<Self::Api> { ... }
}