docs: function() {
      var self = this;
      var children = self._children;
      var prev = self.state.childrenLoadingStatus;
      var isLoading = false;
  
      for (var k in children) {
        if (children[k]) {
          isLoading = true;
          break;
        }
      }
  
      if (prev === isLoading) return;
      self.setState({childrenLoadingStatus: isLoading});
    }