How to make a typedef or using for a method pointer to a class template?

I have a object subclassed from Parent that creates a child. It gives the child an std::function to call to report status, but in practice the std:function would probably always be a method on the parent, so as a convenience an additional constructor is provided that takes that as an argument.

I've made a typedef of the std::function, but I can't figure out how to make a typedef of the method pointer.

class Child { // No Hungarian: abstract class, so no variables of this type exist.
  
public:

  typedef std::function< void( Parent* pparent_in, Msg* pmsg ) > FuncCB;

  // can't figure out some way to define an MethodCB.
  //template<T> typedef void (T::*MethodCB)();

  Child( Parent* pparent_in, FuncCB asynccb_in ) :
      pparent( pparent_in ),
      asynccb_( asynccb_in )
  {
  };

  template<typename T>
  // can't figure out some way to define an MethodCB.
  //Child( Parent* pparent_in, MethodCB pmethod_in ) :
  Child( Parent* pparent_in, void (T::*pmethod_in)() ) :
      Child( pparent_in, [=]() { (pparent_in->*pmethod_in)(); } )
  {
  };