Function countChildren

code/new-context-api/public/app.js:18619–18621

* Count the number of children that are typically specified as * `props.children`. * * See https://reactjs.org/docs/react-api.html#react.children.count * * @param {?*} children Children tree container. * @return {number} The number of children.

(children, context)

 * @return {number} The number of children.
 */
function countChildren(children, context) {
  return traverseAllChildren(children, emptyFunction.thatReturnsNull, null);
}

/**
 * Flatten a children object (typically specified as `props.children`) and