pub trait VStackAPI<Inp> {
type Out;
// Required method
fn vstack_f(self) -> Result<Self::Out, Error>;
// Provided method
fn vstack(self) -> Self::Out
where Self: Sized { ... }
}
pub trait VStackAPI<Inp> {
type Out;
// Required method
fn vstack_f(self) -> Result<Self::Out, Error>;
// Provided method
fn vstack(self) -> Self::Out
where Self: Sized { ... }
}