I have an expandable list where the children are not loaded until a group is clicked. The children are loaded using an HTTP request to a PHP service. I want to show either a progress bar inside the group view, or show a "please wait, loading..." dialog box while the children are being fetched. Any ideas how to accomplish this? The groups are also loaded via HTTP request to a PHP service and I have a message dialog being displayed while loading the groups but cannot figure out a way to do it with the children
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