You can search for identifiers within the package.
in-package search v0.2.0
melange.js_parser
Flow_ast.Variance
type 'M t = 'M * 'M t'
and kind =
| Plus
| Minus
| Readonly
| In
| Out
| InOut
and 'M t' = {
kind : kind;
comments : ('M, unit) Syntax.t option;
}