Support obtaining the curve of AnimatableCurve

[MushineLament]

What problem does this solve or what need does it fill?

Allow modification of known animation curves, random or targeted adjustments to animation curves.

What solution would you like?

impl<P, C> Debug for AnimatableCurve<P, C>
where
    C: Debug,
{
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        f.debug_struct("AnimatableCurve")
            **.field("curve", &self.curve)**
            .finish()
    }
}

I have noticed that dyn AnimableCurve supports printing on debug traits that have already been implemented, so I think it is possible to allow C generics to return data when implementing a certain trait.

So only when the C generic supports a certain trait, will it return the actual data of AnimableCurve.

Meanwhile, this trait supports converting data, just like converting any trait to an actual type.

What alternative(s) have you considered?

Not.

Additional context

I haven't found any known AnimatableCurve to obtain actual curve data, please let me know if there is.