pub trait TSender: Send + 'static {
// Required method
fn write_byte(&mut self, byte: u8) -> bool;
// Provided method
fn write_bytes(&mut self, bytes: &[u8]) -> usize { ... }
}pub trait TSender: Send + 'static {
// Required method
fn write_byte(&mut self, byte: u8) -> bool;
// Provided method
fn write_bytes(&mut self, bytes: &[u8]) -> usize { ... }
}