You can search for identifiers within the package.
in-package search v0.2.0
val write_uint16 : int -> (encoder -> 'r state) -> encoder -> 'r state
val write_uint32 : int32 -> (encoder -> 'r state) -> encoder -> 'r state
val write_uint64 : int64 -> (encoder -> 'r state) -> encoder -> 'r state