class type['a]
fs =object
..end
method string_of_filename : 'a filename -> string
method open_out : ?mode:Pervasives.open_flag list ->
?perm:int -> 'a filename -> writer
method open_in : ?mode:Pervasives.open_flag list ->
?perm:int -> 'a filename -> reader
method file_exists : 'a filename -> bool
method remove : 'a filename -> unit