pub fn add<I: Index, T: ComplexField, LhsT: Conjugate<Canonical = T>, RhsT: Conjugate<Canonical = T>>(
lhs: SparseColMatRef<'_, I, LhsT>,
rhs: SparseColMatRef<'_, I, RhsT>,
) -> Result<SparseColMat<I, T>, FaerError>pub fn add<I: Index, T: ComplexField, LhsT: Conjugate<Canonical = T>, RhsT: Conjugate<Canonical = T>>(
lhs: SparseColMatRef<'_, I, LhsT>,
rhs: SparseColMatRef<'_, I, RhsT>,
) -> Result<SparseColMat<I, T>, FaerError>