docs: public void writeAsyncHeader(@NotNull Wire wire, String csp, long cid) {
          assert outBytesLock().isHeldByCurrentThread();
  
          wire.writeDocument(true, wireOut -> {
              if (cid == 0)
                  wireOut.writeEventName(CoreFields.csp).text(csp);
              else
                  wireOut.writeEventName(CoreFields.cid).int64(cid);
          });
      }