pub fn lower(&self) -> Option<&RangeBound<LowerBound, T>> {
        match self.inner {
            Normal(Some(ref lower), _) => Some(lower),
            _ => None,
        }
    }
/// Returns the lower bound if it exists.
Returns the lower bound if it exists.
Returns the lower bound if it exists .
pub fn lower(&self) -> Option<&RangeBound<LowerBound, T>> {
        match self.inner {
            Normal(Some(ref lower), _) => Some(lower),
            _ => None,
        }
    }
pub fn lower ( & self ) -> Option < & RangeBound < LowerBound , T > > { match self . inner { Normal ( Some ( ref lower ) , _ ) => Some ( lower ) , _ => None , } }
Returns the lower bound if it exists.
Returns the lower bound if it exists .
&self
&self