val to_sanger : 'a format ‑> 'a Defs.fastq Bistro.Std.workflow ‑> [ `sanger ] Defs.fastq Bistro.Std.workflow
val concat : 'a Defs.fastq Bistro.Std.workflow list ‑> 'a Defs.fastq Bistro.Std.workflow
val head : int ‑> 'a Defs.fastq Bistro.Std.workflow ‑> 'a Defs.fastq Bistro.Std.workflow