IssueTracker

I think there are could be some corner cases when it is not enough.
when some LayoutNode which draws being removed we want to invalidate the RepaintBoundary containing it.
instead we do parentLayoutNode.onRequestMeasure, which iterates through all the parents it affects and then calls or requestLayout or invalidateRepaintBoundary for this grandParent. In first case requestLayout will cause invalidation of out AndroidComposeView and in the second invalidateRepaintBoundary can be potentially happening on other RepaintBoundary which wraps our grandparent. So the RepaintBoundary wrapping our original LayoutNode can be left not being redrawn.
right?

Project: platform/frameworks/support
Branch: androidx-master-dev

commit b0286ae80bb8901cc834a88d5fe66f55f4817de3
Author: George Mount <mount@google.com>
Date:   Thu Feb 20 15:14:09 2020

    Add support for a LayerModifier.
   
    Fixes: 150774014
   
    This is the first step of changing RepaintBoundaryNode
    to use modifiers instead. The next step is to replace
    all use of RepaintBoundaryNode.
   
    Relnote: "Added LayerModifier, a modifier that allows
    adding a RenderNode for a Layout. It allows setting
    clipping, opacity, rotation, scaling, and shadows.
    This will replace RepaintBoundary."
   
    Test: ran AndroidLayoutDrawTest
   
    Change-Id: I7100dfe7a795567a48c2d5b3094e3dbd47e0f9c7

M       ui/ui-core/api/0.1.0-dev07.txt
M       ui/ui-core/api/current.txt
M       ui/ui-core/api/public_plus_experimental_0.1.0-dev07.txt
M       ui/ui-core/api/public_plus_experimental_current.txt
M       ui/ui-core/api/restricted_0.1.0-dev07.txt
M       ui/ui-core/api/restricted_current.txt
M       ui/ui-core/build.gradle
A       ui/ui-core/integration-tests/samples/src/main/java/androidx/ui/core/samples/LayerModifierSamples.kt
A       ui/ui-core/src/main/java/androidx/ui/core/DrawLayerModifier.kt
M       ui/ui-framework/src/androidTest/java/androidx/ui/core/test/AndroidLayoutDrawTest.kt
M       ui/ui-geometry/api/0.1.0-dev07.txt
M       ui/ui-geometry/api/current.txt
M       ui/ui-geometry/api/public_plus_experimental_0.1.0-dev07.txt
M       ui/ui-geometry/api/public_plus_experimental_current.txt
M       ui/ui-geometry/api/restricted_0.1.0-dev07.txt
M       ui/ui-geometry/api/restricted_current.txt
M       ui/ui-geometry/src/main/java/androidx/ui/geometry/RRect.kt
M       ui/ui-material/src/main/java/androidx/ui/material/Drawer.kt
M       ui/ui-platform/api/0.1.0-dev07.txt
M       ui/ui-platform/api/current.txt
M       ui/ui-platform/api/public_plus_experimental_0.1.0-dev07.txt
M       ui/ui-platform/api/public_plus_experimental_current.txt
M       ui/ui-platform/api/restricted_0.1.0-dev07.txt
M       ui/ui-platform/api/restricted_current.txt
M       ui/ui-platform/src/main/java/androidx/ui/core/AndroidOwner.kt
M       ui/ui-platform/src/main/java/androidx/ui/core/ComponentNodes.kt
M       ui/ui-platform/src/main/java/androidx/ui/core/LayoutNodeWrapper.kt
A       ui/ui-platform/src/main/java/androidx/ui/core/OutlineResolver.kt
A       ui/ui-platform/src/main/java/androidx/ui/core/OwnedLayer.kt
A       ui/ui-platform/src/main/java/androidx/ui/core/RenderNodeLayer.kt
A       ui/ui-platform/src/main/java/androidx/ui/core/ViewLayer.kt

https://android-review.googlesource.com/1242671