Function serialize_quantity 

pub fn serialize_quantity<S, T>(
    value: &T,
    serializer: S,
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
    S: Serializer,
    T: Serialize + Clone + Into<DynQuantity<Complex<f64>>>,

Enables serialization of a quantity (any type implementing Into<DynQuantity>) into a string containing both the value and the units.

When a value is serialized using serialize_with_units, this function stores a quantity as a string containing both the raw value and the units. If serialize_with_units is not used, this function serializes its field using the default Serialize implementation of the type.

For examples see the serialize_with_units documentation.