pub trait UncheckedAdd<Rhs = Self> {
    type Output;
    // Required method
    fn unchecked_add(self, rhs: Rhs) -> Self::Output;
}pub trait UncheckedAdd<Rhs = Self> {
    type Output;
    // Required method
    fn unchecked_add(self, rhs: Rhs) -> Self::Output;
}