You can search for identifiers within the package.
in-package search v0.2.0
type error_kind = [
| `Decode
| `Eval
| `Init
| `Invalid_state
| `Link
| `No_fallback_decode
| `No_fallback_init
| `No_fallback_link
| `Too_many_reboots
| `Too_many_ticks
| `Unknown
]
module type S = sig ... end