Trait Observer 

pub trait Observer {
    // Required methods
    fn on_event(&self, index: usize, event: &Event);
    fn on_after_event(&self, index: usize, state: &State);
    fn on_close(&self);
}

Required Methods

fn on_event(&self, index: usize, event: &Event)

fn on_after_event(&self, index: usize, state: &State)

fn on_close(&self)

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors