code: public boolean checkInitAndOpen() {
          synchronized (linkStatusSync) {
              if (linkStatus == LINK_STATUS.INIT) {
                  if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                      Tr.debug(tc, "checkInitAndOpen: connection preface completed, set :linkStatus: to OPEN" + " H2InboundLink hc: " + this.hashCode());
                  }
                  linkStatus = LINK_STATUS.OPEN;
                  return true;
              }
              return false;
          }
      }
docs: Check to see if the connection is still initializing (in INIT state). If it is, update the state to OPEN.
  
  @return true if the link status is in INIT state