code: private UIComponent createChild(
              FacesContext context,
              UIComponent parent,
              UIComponentClassicTagBase parentTag,
              String componentId) throws JspException {
  
          UIComponent component = createComponent(context, componentId);
          int indexOfNextChildTag = parentTag.getIndexOfNextChildTag();
          if (indexOfNextChildTag > parent.getChildCount()) {
              indexOfNextChildTag = parent.getChildCount();
          }
          parent.getChildren().add(indexOfNextChildTag, component);
          created = true;
          return (component);
  
      }
docs: <p>Create a new child component using <code>createComponent</code>,
  initialize its properties, and add it to its parent as a child.
  </p>
  @param context {@link FacesContext} for the current request
  @param parent Parent {@link UIComponent} for the new child
  @param componentId Component identifier for the new child,
  or <code>null</code> for no explicit identifier