如何/何时在Breeze中查询“扩展”实体

I have a ViewModel that loads up 'child' entities and I want to also display 'grandchild' entities based off of each child that is loaded. To simplify things, I need help identifying how to query these objects and display them under the proper 'tree' in the browser (apologies for my butchering of coding language : ))I have a ViewModel that loads up 'child' entiti