Function WarnOnMount

packages/react-devtools-shell/src/app/InlineWarnings/index.js:13–18

({children = null})

// $FlowFixMe[missing-local-annot]
function WarnOnMount({children = null}) {
  useEffect(() => {
    console.warn('This warning fires on initial mount only');
  }, []);
  return children;
}

// $FlowFixMe[missing-local-annot]
function WarnOnUpdate({children = null}) {