Function memo

docs/external/js/react.development.js:1532–1544

(type, compare)

  }

  function memo(type, compare) {
    {
      if (!isValidElementType(type)) {
        error('memo: The first argument must be a component. Instead ' + 'received: %s', type === null ? 'null' : typeof type);
      }
    }

    return {
      $$typeof: REACT_MEMO_TYPE,
      type: type,
      compare: compare === undefined ? null : compare
    };
  }

  function resolveDispatcher() {
    var dispatcher = ReactCurrentDispatcher.current;