Function apply_name_request 

pub fn apply_name_request(
    doc: &mut AutoCommit,
    request: &GroupNameRequest,
) -> bool

Write what a GroupNameRequest asks for: name its range, or, with an empty label, remove the name it replaces. A range named again from another first change drops the record it replaces, so one run of changes carries one name. false when there was nothing to write. The transaction is left open for the host to commit.