pub fn is_left(&self) -> bool {
        match *self {
            Either::Left(_) => true,
            Either::Right(_) => false,
        }
    }
/// Return true if the value is the `Left` variant.
Return true if the value is the `Left` variant.
Return true if the value is the ` Left ` variant .
pub fn is_left(&self) -> bool {
        match *self {
            Either::Left(_) => true,
            Either::Right(_) => false,
        }
    }
pub fn is_left ( & self ) -> bool { match * self { Either :: Left ( _ ) => true , Either :: Right ( _ ) => false , } }
Return true if the value is the `Left` variant.
Return true if the value is the ` Left ` variant .
&self
&self