Gets all futures in an environment, a list, or a list environment and returns an object of the same class (and dimensions). Non-future elements are returned as is.
futures(x, ...)An environment, a list, or a list environment.
Not used.
An object of same type as x and with the same names
and/or dimensions, if set.
This function is useful for retrieve futures that were created via
future assignments (%<-%) and therefore stored as promises.
This function turns such promises into standard Future
objects.