user: Explain Bpy.Types.Alphaunderstrip in complete detail according to the official Blender documentation.

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ClampToConstraint(Constraint) ClothCollisionSettings(bpy_struct) ClothModifier(Modifier) ClothSettings(bpy_struct) ClothSolverResult(bpy_struct) CloudsTexture(Texture) Collection(ID) CollectionChild(bpy_struct) CollectionChildren(bpy_struct) CollectionExport(bpy_struct) CollectionExports(bpy_struct) CollectionLightLinking(bpy_struct) CollectionObject(bpy_struct) CollectionObjects(bpy_struct) CollectionProperty(Property) CollisionModifier(Modifier) CollisionSettings(bpy_struct) ColorBalanceModifier(StripModifier) ColorManagedDisplaySettings(bpy_struct) ColorManagedInputColorspaceSettings(bpy_struct) ColorManagedSequencerColorspaceSettings(bpy_struct) ColorManagedViewSettings(bpy_struct) ColorMapping(bpy_struct) ColorMixStrip(EffectStrip) ColorRamp(bpy_struct) ColorRampElement(bpy_struct) ColorRampElements(bpy_struct) ColorStrip(EffectStrip) CompositorNode(NodeInternal) CompositorNodeAlphaOver(CompositorNode) CompositorNodeAntiAliasing(CompositorNode) CompositorNodeBilateralblur(CompositorNode) CompositorNodeBlur(CompositorNode) CompositorNodeBokehBlur(CompositorNode) CompositorNodeBokehImage(CompositorNode) CompositorNodeBoxMask(CompositorNode) CompositorNodeBrightContrast(CompositorNode) CompositorNodeChannelMatte(CompositorNode) CompositorNodeChromaMatte(CompositorNode) CompositorNodeColorBalance(CompositorNode) CompositorNodeColorCorrection(CompositorNode) CompositorNodeColorMatte(CompositorNode) CompositorNodeColorSpill(CompositorNode) CompositorNodeCombineColor(CompositorNode) CompositorNodeConvertColorSpace(CompositorNode) CompositorNodeConvertToDisplay(CompositorNode) CompositorNodeConvolve(CompositorNode) CompositorNodeCornerPin(CompositorNode) CompositorNodeCrop(CompositorNode) CompositorNodeCryptomatte(CompositorNode) CompositorNodeCryptomatteV2(CompositorNode) CompositorNodeCurveRGB(CompositorNode) CompositorNodeCustomGroup(CompositorNode) CompositorNodeDBlur(CompositorNode) CompositorNodeDefocus(CompositorNode) 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CompositorNodeSwitch(CompositorNode) CompositorNodeSwitchView(CompositorNode) CompositorNodeTime(CompositorNode) CompositorNodeTonemap(CompositorNode) CompositorNodeTrackPos(CompositorNode) CompositorNodeTransform(CompositorNode) CompositorNodeTranslate(CompositorNode) CompositorNodeTree(NodeTree) CompositorNodeVecBlur(CompositorNode) CompositorNodeViewer(CompositorNode) CompositorNodeZcombine(CompositorNode) ConsoleLine(bpy_struct) Constraint(bpy_struct) ConstraintTarget(bpy_struct) ConstraintTargetBone(bpy_struct) Context(bpy_struct) CopyLocationConstraint(Constraint) CopyRotationConstraint(Constraint) CopyScaleConstraint(Constraint) CopyTransformsConstraint(Constraint) CorrectiveSmoothModifier(Modifier) CrossStrip(EffectStrip) CryptomatteEntry(bpy_struct) Curve(ID) CurveMap(bpy_struct) CurveMapPoint(bpy_struct) CurveMapPoints(bpy_struct) CurveMapping(bpy_struct) CurveModifier(Modifier) CurvePaintSettings(bpy_struct) CurvePoint(bpy_struct) CurveProfile(bpy_struct) CurveProfilePoint(bpy_struct) CurveProfilePoints(bpy_struct) CurveSlice(bpy_struct) CurveSplines(bpy_struct) Curves(ID) CurvesModifier(StripModifier) CurvesSculpt(Paint) DATA_UL_bone_collections(UIList) DampedTrackConstraint(Constraint) DataTransferModifier(Modifier) DecimateModifier(Modifier) Depsgraph(bpy_struct) DepsgraphObjectInstance(bpy_struct) DepsgraphUpdate(bpy_struct) DisplaceModifier(Modifier) DisplaySafeAreas(bpy_struct) DistortedNoiseTexture(Texture) DopeSheet(bpy_struct) Driver(bpy_struct) DriverTarget(bpy_struct) DriverVariable(bpy_struct) DynamicPaintBrushSettings(bpy_struct) DynamicPaintCanvasSettings(bpy_struct) DynamicPaintModifier(Modifier) DynamicPaintSurface(bpy_struct) DynamicPaintSurfaces(bpy_struct) EQCurveMappingData(bpy_struct) EdgeSplitModifier(Modifier) EditBone(bpy_struct) EffectStrip(Strip) EffectorWeights(bpy_struct) EnumProperty(Property) EnumPropertyItem(bpy_struct) EvaluateClosureNodeViewerPathElem(ViewerPathElem) Event(bpy_struct) 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GeometryAttributeConstraint(Constraint) GeometryNode(NodeInternal) GeometryNodeAccumulateField(GeometryNode) GeometryNodeAttributeDomainSize(GeometryNode) GeometryNodeAttributeStatistic(GeometryNode) GeometryNodeBake(GeometryNode) GeometryNodeBlurAttribute(GeometryNode) GeometryNodeBoundBox(GeometryNode) GeometryNodeCameraInfo(GeometryNode) GeometryNodeCaptureAttribute(GeometryNode) GeometryNodeCollectionInfo(GeometryNode) GeometryNodeConvexHull(GeometryNode) GeometryNodeCornersOfEdge(GeometryNode) GeometryNodeCornersOfFace(GeometryNode) GeometryNodeCornersOfVertex(GeometryNode) GeometryNodeCurveArc(GeometryNode) GeometryNodeCurveEndpointSelection(GeometryNode) GeometryNodeCurveHandleTypeSelection(GeometryNode) GeometryNodeCurveLength(GeometryNode) GeometryNodeCurveOfPoint(GeometryNode) GeometryNodeCurvePrimitiveBezierSegment(GeometryNode) GeometryNodeCurvePrimitiveCircle(GeometryNode) GeometryNodeCurvePrimitiveLine(GeometryNode) GeometryNodeCurvePrimitiveQuadrilateral(GeometryNode) GeometryNodeCurveQuadraticBezier(GeometryNode) GeometryNodeCurveSetHandles(GeometryNode) GeometryNodeCurveSpiral(GeometryNode) GeometryNodeCurveSplineType(GeometryNode) GeometryNodeCurveStar(GeometryNode) GeometryNodeCurveToMesh(