def annotate_exception(ex)
      new_ex = ex.exception("#{ex}; caused by #{self}")
      new_ex.set_backtrace(ex.backtrace)
      new_ex
    end
def annotate_exception(ex)
      new_ex = ex.exception("#{ex}; caused by #{self}")
      new_ex.set_backtrace(ex.backtrace)
      new_ex
    end
Make a new exception from ex, mark it as being caused by this message
 @api private