You can search for identifiers within the package.
in-package search v0.2.0
coq-core.kernel
Primred.RedNative
module E : RedNativeEntries
type elem = E.elem
type args = E.args
type evd = E.evd
type uinstance = E.uinstance
val red_prim : Environ.env -> evd -> CPrimitives.t -> uinstance -> args -> elem option