Function yoneda_representative_element 

pub fn yoneda_representative_element<CC>(
    cc: Arc<CC>,
    b: Bidegree,
    class: &[u32],
) -> Yoneda<CC>
where
    CC: FreeChainComplex + AugmentedChainComplex<ChainMap = FreeModuleHomomorphism<<<CC as AugmentedChainComplex>::TargetComplex as ChainComplex>::Module>>,
    CC::TargetComplex: BoundedChainComplex,
    CC::Algebra: GeneratedAlgebra,