method to_int : int
method to_float : float
method to_float_array : float array
+ method of_float_array : float array -> value_type
method to_string : string
method normalize : unit
method add : value_type -> value_type
class type io_type =
object
+ method set : string -> string -> unit
method read : string array -> beam_type
method write : int array -> float array array array -> string array
end;;