pub fn mass_batch_slice(
high: &[f64],
low: &[f64],
sweep: &MassBatchRange,
kern: Kernel,
) -> Result<MassBatchOutput, MassError>pub fn mass_batch_slice(
high: &[f64],
low: &[f64],
sweep: &MassBatchRange,
kern: Kernel,
) -> Result<MassBatchOutput, MassError>