pub trait SetSocketOption<P>: SocketOption<P> {
// Required method
fn data(&self) -> &Self::Data;
// Provided method
fn size(&self) -> usize { ... }
}
pub trait SetSocketOption<P>: SocketOption<P> {
// Required method
fn data(&self) -> &Self::Data;
// Provided method
fn size(&self) -> usize { ... }
}