pub fn lower(&self) -> usize {
        match self {
            Span::Continuous(span) => span.lower,
            Span::Discontinuous(span) => span.lower,
        }
    }
/// Get this spans lower bounds.
Get this spans lower bounds.
Get this spans lower bounds .
pub fn lower(&self) -> usize {
        match self {
            Span::Continuous(span) => span.lower,
            Span::Discontinuous(span) => span.lower,
        }
    }
pub fn lower ( & self ) -> usize { match self { Span :: Continuous ( span ) => span . lower , Span :: Discontinuous ( span ) => span . lower , } }
Get this spans lower bounds.
Get this spans lower bounds .
&self
&self