Function createDefaultProps

transforms/class.js:380–388

  };

  const createDefaultProps = prop =>
    withComments(
      j.property(
        'init',
        j.identifier(DEFAULT_PROPS_KEY),
        pickReturnValueOrCreateIIFE(prop.value)
      ),
      prop
    );

  // Collects `childContextTypes`, `contextTypes`, `displayName`, and `propTypes`;
  // simplifies `getDefaultProps` or converts it to an IIFE;