code: @Override
      public void setStatusCode(StatusCodes code) {
  
          if (!code.equals(this.myStatusCode)) {
              this.myStatusCode = code;
              // no matter what, empty out the reason phrase information so that it
              // will default to match this new status code
              this.myReason = null;
              this.myReasonBytes = null;
              super.setFirstLineChanged();
          }
          if (TraceComponent.isAnyTracingEnabled() && tc.isEventEnabled()) {
              Tr.event(tc, "setStatusCode(sc): " + code);
          }
      }
docs: Set the status code of the response message.
  
  @param code