You can search for identifiers within the package.
in-package search v0.2.0
val write : 'a Rio.Writer.t -> string -> (unit, [> Rio.io_error ]) Stdlib.result
val comma : 'a Rio.Writer.t -> (unit, [> Rio.io_error ]) Stdlib.result
val begin_array : 'a Rio.Writer.t -> (unit, [> Rio.io_error ]) Stdlib.result
val end_array : 'a Rio.Writer.t -> (unit, [> Rio.io_error ]) Stdlib.result
val begin_object : 'a Rio.Writer.t -> (unit, [> Rio.io_error ]) Stdlib.result
val end_object : 'a Rio.Writer.t -> (unit, [> Rio.io_error ]) Stdlib.result
val begin_object_key : ?first:bool -> 'a Rio.Writer.t -> (unit, [> Rio.io_error ]) Stdlib.result
val end_object_key : 'a -> (unit, 'b) Stdlib.result
val begin_object_value : 'a Rio.Writer.t -> (unit, [> Rio.io_error ]) Stdlib.result
val end_object_value : 'a -> (unit, 'b) Stdlib.result
val null : 'a Rio.Writer.t -> (unit, [> Rio.io_error ]) Stdlib.result