def obs_bits
import bend-collections@1.0.0.0/src/containers/bitlist.bend as Bitlistimport Base
import bend-collections@1.0.0.0/src/containers/types/bitlist.bend as E
296def obs_bits(r: Bitlist & List<&2, Bool>) -> Bitlist & E.Obs:
297 (s, x) = r
298 (s, E.OBits{x})