Function observe

packages/core/test/setup.ts:140–146

(value: unknown)

    // Observe animations scheduled for next frame.
    const values: FrameValue[] = []
    const observe = (value: unknown) => {
      if (value instanceof FrameValue && !value.idle) {
        getFluidObservers(value)?.forEach(observe)
        addFluidObserver(value, frameObserver)
        values.push(value)
      }
    }

    Globals.assign({
      willAdvance: observe,