This project was generated with Angular CLI version 15.
This is a reproduction of an issue involving use of the ChildrenDirective in FASTTreeItem and FASTTreeView leading to failure to render nested tree items in Angular.
#6740
Console errors:
Uncaught TypeError: Cannot read properties of undefined (reading 'fast-fmoaic-304-c')
at ChildrenDirective.getSource (node-observation.js:[60:22](https://github.com/microsoft/fast/blob/master/packages/web-components/fast-element/src/templating/node-observation.ts#L81))
at ChildrenDirective.handleEvent (children.js:[18:36](https://github.com/microsoft/fast/blob/master/packages/web-components/fast-element/src/templating/children.ts#L100))
at _ZoneDelegate.invoke (zone.js:372:26)
at Zone.runGuarded (zone.js:144:47)
at MutationObserver.<anonymous> (zone.js:128:29)
This reproduction uses Angular 15 and the following FAST packages:
"@microsoft/fast-element": "2.0.0-beta.23",
"@microsoft/fast-foundation": "3.0.0-alpha.27",
"@microsoft/fast-web-utilities": "6.0.0",
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