module Infix:sig..end
BatIMapval (-->) : 'a BatIMap.t -> int -> 'amap-->key returns the current binding of key in map,
orNot_found if no such binding exists.
Equivalent to find key map.val (<--) : 'a BatIMap.t -> int * 'a -> 'a BatIMap.tmap<--(key, value) returns a map containing the same bindings as
map, plus a binding of key to value. If key was already bound
in map, its previous binding disappears. Equivalent to add key value map
Important warning: BatIMap.add takes an optional argument, eq that
is missing in this operator <--. As a consequence, using <-- implies the
use of Pervasives.(==)
as comparison function.