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bbunwrap  Shuttle variables out of a parcel.
   [var1,var2]=bbunwrap(P,{'name1','name2',...}) shuttles the variables
   name1, name2, ... from the parcel P and returns them in var1, ...

   P does not contain a copy of the variables when completed, so you
   may modify them without suffering a copy-on-write.

   If you only need to inspect a variable, or if the variable is known
   to be very small, it is more efficient to use bbpeek.

   See also bbparcel, bbwrap, bbpeek.