pub trait ResolvableOptionalSubstateKey<'a> {
// Required method
fn into_optional_substate_key_or_ref(self) -> Option<SubstateKeyOrRef<'a>>;
}
pub trait ResolvableOptionalSubstateKey<'a> {
// Required method
fn into_optional_substate_key_or_ref(self) -> Option<SubstateKeyOrRef<'a>>;
}