module One : S.MEASURE with type witness = unit
module Minor_allocated : S.MEASURE with type witness = unit
module Major_allocated : S.MEASURE with type witness = unit
module Promoted : S.MEASURE with type witness = unit
module Compaction : S.MEASURE with type witness = unit
module Minor_collection : S.MEASURE with type witness = unit
module Major_collection : S.MEASURE with type witness = unit
module Monotonic_clock : S.MEASURE with type witness = unit
module Extension : sig ... end
module Instance : sig ... end