io.github.libtmux.Layouts.Layouts.require

Accepts the classic checksummed form, a JSON layout (by shape only — a running version is needed to say whether this server could have written it, which TmuxVersion) does), a built-in name, or an unambiguous prefix of exactly one built-in name (layout_set_lookup is a prefix match, so tile and even-h apply on every tmux release). Ambiguity is judged against every name this library knows, not only the ones the eventual server will have — the version to narrow that with is not available here.