Make_indexed.1-X
type ('a, 'i, 'j) t
val bind : ( 'a, 'i, 'j ) t -> f:( 'a -> ( 'b, 'j, 'k ) t ) -> ( 'b, 'i, 'k ) t
val map : [ `Define_using_bind | `Custom of ( 'a, 'i, 'j ) t -> f:( 'a -> 'b ) -> ( 'b, 'i, 'j ) t ]
val return : 'a -> ( 'a, 'i, 'i ) t