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.
An environment, a list, or a list environment.
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
An object of same type as
x and with the same names
and/or dimensions, if set.
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