def at3
import ezx@1.11.0.0/src/lock/lock.bend as Lockimport Base
import ezx@1.11.0.0/src/toml/toml.bend as T
212# the pairs of the table at this three segment path, or none
213def at3(ss: List<&2, T.Sect>, +first: String, +second: String, +third: String) -> List<&2, T.Kv>:
214 match ss:
215 case []:
216 []
217 case +h <> t:
218 at.pick(is3(segs(h), first, second, third), h, at3(t, first, second, third))