code: private void setRequestProperties() {
          inboundRequestMsg.setPipeliningEnabled(pipeliningEnabled); //Value of listener config
          String connectionHeaderValue = inboundRequestMsg.getHeader(HttpHeaderNames.CONNECTION.toString());
          String httpVersion = (String) inboundRequestMsg.getProperty(Constants.HTTP_VERSION);
          inboundRequestMsg.setKeepAlive(isKeepAliveConnection(keepAliveConfig, connectionHeaderValue,
                  httpVersion));
      }
docs: These properties are needed in ballerina side for pipelining checks.