/// A CRAM index record field.
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum Field {
/// Reference sequence ID.
ReferenceSequenceId,
/// Alignment start.
AlignmentStart,
/// Alignment span.
AlignmentSpan,
/// Offset of the container from the start of the stream.
Offset,
/// Offset of the slice from the start of the container.
Landmark,
/// Size of the slice in bytes.
SliceLength,
}