pub fn split_id_name(composite: &str) -> (&str, &str)Expand description
Inverse of compose_id_name: split a composite id{ROW_SEP}name display
name back into (id, name) on the first ROW_SEP. When there is no
separator (a bare symbol, or an id-only composite where name was empty or
equalled id) both parts are the whole string, so a 10x features.tsv still
gets a non-empty gene name.