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bbinline  Substitute operations inline.
   BB=bbinline(BB) inlines certain operations, notably transposition,
   in the black-box operator BB. It also evaluate some constants that
   may require transversing the evaluation tree. The goal is to reduce
   the amount of function evaluations, but also prevents some operations
   such as simplification.

   bbinline should be used when a black-box operator is applied many
   times, or if you want to change an operator using set and want to
   prevent other functions from changing the tree.

   The functions bbfunc and bbfuncm call bbinline before returning
   function handles.

   See also bbfunc, bbfuncm.