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Class
Class type
exception No_value of string
val value : 'a option -> default:'a -> 'a
val value_exn : 'a option -> msg:string -> 'a
val map : 'a option -> f:( 'a -> 'b ) -> 'b option
val iter : 'a option -> f:( 'a -> unit ) -> unit
val value_map : 'a option -> default:'b -> f:( 'a -> 'b ) -> 'b
val return : 'a -> 'a option
val bind : 'a option -> f:( 'a -> 'b option ) -> 'b option
val (>>=) : 'a option -> ( 'a -> 'b option ) -> 'b option