pub fn max_age(&self) -> Option<std::time::Duration> {
        self.0
            .max_age()
            .map(|d| std::time::Duration::new(d.num_seconds() as u64, 0))
    }
/// Get the Max-Age information.
Get the Max-Age information.
Get the Max - Age information .
pub fn max_age(&self) -> Option<std::time::Duration> {
        self.0
            .max_age()
            .map(|d| std::time::Duration::new(d.num_seconds() as u64, 0))
    }
pub fn max_age ( & self ) -> Option < std :: time :: Duration > { self . 0 . max_age ( ) . map ( | d | std :: time :: Duration :: new ( d . num_seconds ( ) as u64 , 0 ) ) }
Get the Max-Age information.
Get the Max - Age information .
&self
&self