class.<query> no longer works after beta 9

[Pikachews]

Bug, feature request, or proposal:

Can no longer use class.<query> in templates after beta 9.

What is the expected behavior?

Queries on classes should work.

What is the current behavior?

They don't work at all.

What are the steps to reproduce?

Example StackBlitz: https://stackblitz.com/edit/angular-flex-layout-seed-6m2khk?file=app/test.component.ts

Remove beta 10 and add beta 9 and the example works. With beta 10, neither of the class.<query> work.

What is the use-case or motivation for changing an existing behavior?

Incorrect behavior

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Flex-layout beta 10

Is there anything else we should know?

ngClass.<query> works, but class.<query> doesn't.

[HJordan35]

We are experiencing the same issue as well when using beta 10

[mackelito]

https://github.com/angular/flex-layout/wiki/ngClass-API

[mackelito]

#419

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