docs-bug(cdk-tree): stackblitz examples are broken

[pedroestabruxelles]

Documentation Feedback

All examples that are importing:
import {NestedFoodNode, NESTED_DATA} from '../tree-data';
are missing that tree-data.ts file

Affected documentation page

https://material.angular.io/cdk/tree/overview

[Sepandard]

Is anybody working on this issue? I can try to fix it if you don't mind.

[andrewseguin]

@Sepandard We'd happily review a contribution if you can help fix the examples