branch fails in 0.21.0 for react@0.14.x

[istarkov]

Example (react 0.14.x):

const modalWindow = ({
  theme,
}) => (
  <div className={theme.component}>
  </div>
);

export const modalWindowHOC = compose(
  themr('modalWindow', modalWindowStyles),
  branch(
    ({ visible }) => !!visible,
    v => v,
    renderNothing,
  ),
);

Errror:

warning.js?0260:45Warning: branch(modalWindow)(...): No `render` method found on the returned component instance: you may have forgotten to define `render`, returned null/false from a stateless component, or tried to render an element whose type is a function that isn't a React component

[istarkov]

The problem that in react x 0.14 which I still use in production ;-) you can't return null from functional components facebook/react#4599 so any branch like

  branch(
    () => false,
    v => v,
    () => () => undefined | null | false,
  ),

will fail