This function is not yet fully documented. This is a transcript of the text-formatted help.

bbpeek  Get a copy of a variable in a parcel.
   This is exactly like bbunwrap, except that the parcel
   remains unchanged.

   bbpeek is more efficient than bbunwrap if you only need
   to read a variable. If you modify it, Matlab's copy-on-write
   mechanism will create a new copy. If the variable is
   sufficiently small this may be more efficient than removing
   it from the pearcel with bbunwrap.

   See also bbparcel, bbunwrap.