You can search for identifiers within the package.
in-package search v0.2.0
val none : 'a option React.signal
val some : 'a React.signal -> 'a option React.signal
val value : ?eq:('a -> 'a -> bool) -> default:[ `Always of 'a React.signal | `Init of 'a React.signal ] -> 'a option React.signal -> 'a React.signal