Function insertInContainerBefore

docs/external/js/react-dom.development.js:7716–7722

(container, child, beforeChild)

    parentInstance.insertBefore(child, beforeChild);
  }
  function insertInContainerBefore(container, child, beforeChild) {
    if (container.nodeType === COMMENT_NODE) {
      container.parentNode.insertBefore(child, beforeChild);
    } else {
      container.insertBefore(child, beforeChild);
    }
  }
  function removeChild(parentInstance, child) {
    parentInstance.removeChild(child);
  }