You can search for identifiers within the package.
in-package search v0.2.0
inherit Ast_mapper_class_404.mapper
val mutable top : bool
val mutable tops : Migrate_parsetree.Ast_404.Parsetree.structure
method structure : Migrate_parsetree.Ast_404.Parsetree.structure -> Migrate_parsetree.Ast_404.Parsetree.structure
method structure_item : Migrate_parsetree.Ast_404.Parsetree.structure_item -> Migrate_parsetree.Ast_404.Parsetree.structure_item
method expr : Migrate_parsetree.Ast_404.Parsetree.expression -> Migrate_parsetree.Ast_404.Parsetree.expression