Function sprs::is_symmetric

pub fn is_symmetric<N, I, Iptr, IpStorage, IStorage, DStorage>(
    mat: &CsMatBase<N, I, IpStorage, IStorage, DStorage, Iptr>
) -> boolwhere
    N: PartialEq,
    I: SpIndex,
    Iptr: SpIndex,
    IpStorage: Deref<Target = [Iptr]>,
    IStorage: Deref<Target = [I]>,
    DStorage: Deref<Target = [N]>,