You can search for identifiers within the package.
in-package search v0.2.0
module Fr : S.PRIME_FIELD with type t = Bls12_381.Fr.t
module G1 : S.CURVE with type Scalar.t = Fr.t
module G2 : S.CURVE with type Scalar.t = Fr.t
val pairing_check : (G1.t * G2.t) list -> bool