How do I throw an Exception with a given backtrace?

If I have aquired a backtrace, e.g. from backtrace() and i want to throw an exception that impersonates an exception being thrown with that backtrace, how do i do it?

found in the julia source code marked a pseudocode:

function throw(val)
     global catch_backtrace = backtrace()

Now sure that will work though

Couldn’t you just create your own exception type to wrap the actually thrown expression and your fake backtrace (also define display_backtrace etc for proper printing and so on)?

yeah, that would do it.
I thought there might be an inbuilt way.
since rethrow(e) basically does this.
Throwning the new exception e with the old backtrace, right?