/// Walk to the next half-edge in the adjacent face.
Walk to the next half-edge in the adjacent face.
Walk to the next half - edge in the adjacent face .
pub fn into_next(mut self) -> Self
    {
        self.as_next();
        self
    }
pub fn into_next ( mut self ) -> Self { self . as_next ( ) ; self }
Walk to the next half-edge in the adjacent face.
Walk to the next half - edge in the adjacent face .
mut self