Bikeshedding Needed for extract_convertibility Method in converter.rs about icu4x HOT 3 CLOSED

pub enum DimensionEquivalency {
  Equivalent, // i.e. length and length
  Reciprocal, // i.e. length/time and time/length
  Unrelated,
}

pub enum UnitConvertibility {
    Convertible, // i.e. meter and foot
    InverseConvertible, // i.e. mpg and l/100km
    NotConvertible, // i.e. meter and square meter
}

impl ConverterFactory { 
    pub fn converter(&self, unit1: &MeasureUnit, unit2: &MeasureUnit2) -> Option<Converter> { ... }
}

impl Converter {
    pub fn convert(&self, ...) -> ... { ... }
    // potential future extensions:
    pub fn is_inverse(&self) -> bool { ... }
    pub fn info(&self) -> ConversionInfo { ... }
}

ConversionInfo {
    offset: Ratio<BigInt>, 
    rate: Ratio<BigInt>,
    is_reciprocal: bool,
}

impl DimensionRegistry { 
    pub fn converter_for(&self, unit1: &MeasureUnit, unit2: &MeasureUnit2) -> Option<Converter> { ... }
}