pub fn as_f64(&self) -> Option<f64> {
        match *self {
            Xml::I32(n) => num::cast(n),
            Xml::F64(n) => Some(n),
            _ => None,
        }
    }
/// If the XML value is a number, return or cast it to a f64.
/// Returns None otherwise.
If the XML value is a number, return or cast it to a f64.
Returns None otherwise.
If the XML value is a number return or cast it to a f64 . Returns None otherwise .
pub fn as_f64(&self) -> Option<f64> {
        match *self {
            Xml::I32(n) => num::cast(n),
            Xml::F64(n) => Some(n),
            _ => None,
        }
    }
pub fn as_f64 ( & self ) -> Option < f64 > { match * self { Xml :: I32 ( n ) => num :: cast ( n ) , Xml :: F64 ( n ) => Some ( n ) , _ => None , } }
If the XML value is a number, return or cast it to a f64.
If the XML value is a number return or cast it to a f64 .
&self