Function serialize 

pub fn serialize<F, I, P, S>(fp: &F, serializer: S) -> Result<S::Ok, S::Error>
where
    F: Into<FixedPoint<I, P>> + Clone,
    I: Serialize,
    FixedPoint<I, P>: Into<f64>,
    S: Serializer,

Available on crate feature serde only.

Serializes to f64.