https://source.android.com/ 
class android.media.WebVttRenderingWidget$RegionLayout extends android.widget.LinearLayout
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: android.media.WebVttRenderingWidget$RegionLayout
  super_class: android.widget.LinearLayout
{
  private final java.util.ArrayList<android.media.WebVttRenderingWidget$CueLayout> mRegionCueBoxes;
    descriptor: Ljava/util/ArrayList;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/ArrayList<Landroid/media/WebVttRenderingWidget$CueLayout;>;

  private final android.media.TextTrackRegion mRegion;
    descriptor: Landroid/media/TextTrackRegion;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private android.view.accessibility.CaptioningManager$CaptionStyle mCaptionStyle;
    descriptor: Landroid/view/accessibility/CaptioningManager$CaptionStyle;
    flags: (0x0002) ACC_PRIVATE

  private float mFontSize;
    descriptor: F
    flags: (0x0002) ACC_PRIVATE

  public void <init>(android.content.Context, android.media.TextTrackRegion, android.view.accessibility.CaptioningManager$CaptionStyle, float);
    descriptor: (Landroid/content/Context;Landroid/media/TextTrackRegion;Landroid/view/accessibility/CaptioningManager$CaptionStyle;F)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=5, args_size=5
        start local 0 // android.media.WebVttRenderingWidget$RegionLayout this
        start local 1 // android.content.Context context
        start local 2 // android.media.TextTrackRegion region
        start local 3 // android.view.accessibility.CaptioningManager$CaptionStyle captionStyle
        start local 4 // float fontSize
         0: .line 1533
            aload 0 /* this */
            aload 1 /* context */
            invokespecial android.widget.LinearLayout.<init>:(Landroid/content/Context;)V
         1: .line 1525
            aload 0 /* this */
            new java.util.ArrayList
            dup
            invokespecial java.util.ArrayList.<init>:()V
            putfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
         2: .line 1535
            aload 0 /* this */
            aload 2 /* region */
            putfield android.media.WebVttRenderingWidget$RegionLayout.mRegion:Landroid/media/TextTrackRegion;
         3: .line 1536
            aload 0 /* this */
            aload 3 /* captionStyle */
            putfield android.media.WebVttRenderingWidget$RegionLayout.mCaptionStyle:Landroid/view/accessibility/CaptioningManager$CaptionStyle;
         4: .line 1537
            aload 0 /* this */
            fload 4 /* fontSize */
            putfield android.media.WebVttRenderingWidget$RegionLayout.mFontSize:F
         5: .line 1540
            aload 0 /* this */
            iconst_1
            invokevirtual android.media.WebVttRenderingWidget$RegionLayout.setOrientation:(I)V
         6: .line 1545
            aload 0 /* this */
            aload 3 /* captionStyle */
            getfield android.view.accessibility.CaptioningManager$CaptionStyle.windowColor:I
            invokevirtual android.media.WebVttRenderingWidget$RegionLayout.setBackgroundColor:(I)V
         7: .line 1547
            return
        end local 4 // float fontSize
        end local 3 // android.view.accessibility.CaptioningManager$CaptionStyle captionStyle
        end local 2 // android.media.TextTrackRegion region
        end local 1 // android.content.Context context
        end local 0 // android.media.WebVttRenderingWidget$RegionLayout this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    8     0          this  Landroid/media/WebVttRenderingWidget$RegionLayout;
            0    8     1       context  Landroid/content/Context;
            0    8     2        region  Landroid/media/TextTrackRegion;
            0    8     3  captionStyle  Landroid/view/accessibility/CaptioningManager$CaptionStyle;
            0    8     4      fontSize  F
    MethodParameters:
              Name  Flags
      context       
      region        
      captionStyle  
      fontSize      

  public void setCaptionStyle(android.view.accessibility.CaptioningManager$CaptionStyle, float);
    descriptor: (Landroid/view/accessibility/CaptioningManager$CaptionStyle;F)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=6, args_size=3
        start local 0 // android.media.WebVttRenderingWidget$RegionLayout this
        start local 1 // android.view.accessibility.CaptioningManager$CaptionStyle captionStyle
        start local 2 // float fontSize
         0: .line 1550
            aload 0 /* this */
            aload 1 /* captionStyle */
            putfield android.media.WebVttRenderingWidget$RegionLayout.mCaptionStyle:Landroid/view/accessibility/CaptioningManager$CaptionStyle;
         1: .line 1551
            aload 0 /* this */
            fload 2 /* fontSize */
            putfield android.media.WebVttRenderingWidget$RegionLayout.mFontSize:F
         2: .line 1553
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            invokevirtual java.util.ArrayList.size:()I
            istore 3 /* cueCount */
        start local 3 // int cueCount
         3: .line 1554
            iconst_0
            istore 4 /* i */
        start local 4 // int i
         4: goto 8
         5: .line 1555
      StackMap locals: int int
      StackMap stack:
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            iload 4 /* i */
            invokevirtual java.util.ArrayList.get:(I)Ljava/lang/Object;
            checkcast android.media.WebVttRenderingWidget$CueLayout
            astore 5 /* cueBox */
        start local 5 // android.media.WebVttRenderingWidget$CueLayout cueBox
         6: .line 1556
            aload 5 /* cueBox */
            aload 1 /* captionStyle */
            fload 2 /* fontSize */
            invokevirtual android.media.WebVttRenderingWidget$CueLayout.setCaptionStyle:(Landroid/view/accessibility/CaptioningManager$CaptionStyle;F)V
        end local 5 // android.media.WebVttRenderingWidget$CueLayout cueBox
         7: .line 1554
            iinc 4 /* i */ 1
      StackMap locals:
      StackMap stack:
         8: iload 4 /* i */
            iload 3 /* cueCount */
            if_icmplt 5
        end local 4 // int i
         9: .line 1559
            aload 0 /* this */
            aload 1 /* captionStyle */
            getfield android.view.accessibility.CaptioningManager$CaptionStyle.windowColor:I
            invokevirtual android.media.WebVttRenderingWidget$RegionLayout.setBackgroundColor:(I)V
        10: .line 1560
            return
        end local 3 // int cueCount
        end local 2 // float fontSize
        end local 1 // android.view.accessibility.CaptioningManager$CaptionStyle captionStyle
        end local 0 // android.media.WebVttRenderingWidget$RegionLayout this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0   11     0          this  Landroid/media/WebVttRenderingWidget$RegionLayout;
            0   11     1  captionStyle  Landroid/view/accessibility/CaptioningManager$CaptionStyle;
            0   11     2      fontSize  F
            3   11     3      cueCount  I
            4    9     4             i  I
            6    7     5        cueBox  Landroid/media/WebVttRenderingWidget$CueLayout;
    MethodParameters:
              Name  Flags
      captionStyle  
      fontSize      

  public void measureForParent(int, int);
    descriptor: (II)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=8, args_size=3
        start local 0 // android.media.WebVttRenderingWidget$RegionLayout this
        start local 1 // int widthMeasureSpec
        start local 2 // int heightMeasureSpec
         0: .line 1567
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegion:Landroid/media/TextTrackRegion;
            astore 3 /* region */
        start local 3 // android.media.TextTrackRegion region
         1: .line 1568
            iload 1 /* widthMeasureSpec */
            invokestatic android.view.View$MeasureSpec.getSize:(I)I
            istore 4 /* specWidth */
        start local 4 // int specWidth
         2: .line 1569
            iload 2 /* heightMeasureSpec */
            invokestatic android.view.View$MeasureSpec.getSize:(I)I
            istore 5 /* specHeight */
        start local 5 // int specHeight
         3: .line 1570
            aload 3 /* region */
            getfield android.media.TextTrackRegion.mWidth:F
            f2i
            istore 6 /* width */
        start local 6 // int width
         4: .line 1573
            iload 6 /* width */
            iload 4 /* specWidth */
            imul
            bipush 100
            idiv
            istore 7 /* size */
        start local 7 // int size
         5: .line 1575
            iload 7 /* size */
            ldc -2147483648
            invokestatic android.view.View$MeasureSpec.makeMeasureSpec:(II)I
            istore 1 /* widthMeasureSpec */
         6: .line 1576
            iload 5 /* specHeight */
            ldc -2147483648
            invokestatic android.view.View$MeasureSpec.makeMeasureSpec:(II)I
            istore 2 /* heightMeasureSpec */
         7: .line 1577
            aload 0 /* this */
            iload 1 /* widthMeasureSpec */
            iload 2 /* heightMeasureSpec */
            invokevirtual android.media.WebVttRenderingWidget$RegionLayout.measure:(II)V
         8: .line 1578
            return
        end local 7 // int size
        end local 6 // int width
        end local 5 // int specHeight
        end local 4 // int specWidth
        end local 3 // android.media.TextTrackRegion region
        end local 2 // int heightMeasureSpec
        end local 1 // int widthMeasureSpec
        end local 0 // android.media.WebVttRenderingWidget$RegionLayout this
      LocalVariableTable:
        Start  End  Slot               Name  Signature
            0    9     0               this  Landroid/media/WebVttRenderingWidget$RegionLayout;
            0    9     1   widthMeasureSpec  I
            0    9     2  heightMeasureSpec  I
            1    9     3             region  Landroid/media/TextTrackRegion;
            2    9     4          specWidth  I
            3    9     5         specHeight  I
            4    9     6              width  I
            5    9     7               size  I
    MethodParameters:
                   Name  Flags
      widthMeasureSpec   
      heightMeasureSpec  

  public void prepForPrune();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=4, args_size=1
        start local 0 // android.media.WebVttRenderingWidget$RegionLayout this
         0: .line 1587
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            invokevirtual java.util.ArrayList.size:()I
            istore 1 /* cueCount */
        start local 1 // int cueCount
         1: .line 1588
            iconst_0
            istore 2 /* i */
        start local 2 // int i
         2: goto 6
         3: .line 1589
      StackMap locals: int int
      StackMap stack:
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            iload 2 /* i */
            invokevirtual java.util.ArrayList.get:(I)Ljava/lang/Object;
            checkcast android.media.WebVttRenderingWidget$CueLayout
            astore 3 /* cueBox */
        start local 3 // android.media.WebVttRenderingWidget$CueLayout cueBox
         4: .line 1590
            aload 3 /* cueBox */
            invokevirtual android.media.WebVttRenderingWidget$CueLayout.prepForPrune:()V
        end local 3 // android.media.WebVttRenderingWidget$CueLayout cueBox
         5: .line 1588
            iinc 2 /* i */ 1
      StackMap locals:
      StackMap stack:
         6: iload 2 /* i */
            iload 1 /* cueCount */
            if_icmplt 3
        end local 2 // int i
         7: .line 1592
            return
        end local 1 // int cueCount
        end local 0 // android.media.WebVttRenderingWidget$RegionLayout this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    8     0      this  Landroid/media/WebVttRenderingWidget$RegionLayout;
            1    8     1  cueCount  I
            2    7     2         i  I
            4    5     3    cueBox  Landroid/media/WebVttRenderingWidget$CueLayout;

  public void put(android.media.TextTrackCue);
    descriptor: (Landroid/media/TextTrackCue;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=5, args_size=2
        start local 0 // android.media.WebVttRenderingWidget$RegionLayout this
        start local 1 // android.media.TextTrackCue cue
         0: .line 1601
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            invokevirtual java.util.ArrayList.size:()I
            istore 2 /* cueCount */
        start local 2 // int cueCount
         1: .line 1602
            iconst_0
            istore 3 /* i */
        start local 3 // int i
         2: goto 8
         3: .line 1603
      StackMap locals: int int
      StackMap stack:
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            iload 3 /* i */
            invokevirtual java.util.ArrayList.get:(I)Ljava/lang/Object;
            checkcast android.media.WebVttRenderingWidget$CueLayout
            astore 4 /* cueBox */
        start local 4 // android.media.WebVttRenderingWidget$CueLayout cueBox
         4: .line 1604
            aload 4 /* cueBox */
            invokevirtual android.media.WebVttRenderingWidget$CueLayout.getCue:()Landroid/media/TextTrackCue;
            aload 1 /* cue */
            if_acmpne 7
         5: .line 1605
            aload 4 /* cueBox */
            invokevirtual android.media.WebVttRenderingWidget$CueLayout.update:()V
         6: .line 1606
            return
        end local 4 // android.media.WebVttRenderingWidget$CueLayout cueBox
         7: .line 1602
      StackMap locals:
      StackMap stack:
            iinc 3 /* i */ 1
      StackMap locals:
      StackMap stack:
         8: iload 3 /* i */
            iload 2 /* cueCount */
            if_icmplt 3
        end local 3 // int i
         9: .line 1610
            new android.media.WebVttRenderingWidget$CueLayout
            dup
            aload 0 /* this */
            invokevirtual android.media.WebVttRenderingWidget$RegionLayout.getContext:()Landroid/content/Context;
            aload 1 /* cue */
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mCaptionStyle:Landroid/view/accessibility/CaptioningManager$CaptionStyle;
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mFontSize:F
            invokespecial android.media.WebVttRenderingWidget$CueLayout.<init>:(Landroid/content/Context;Landroid/media/TextTrackCue;Landroid/view/accessibility/CaptioningManager$CaptionStyle;F)V
            astore 3 /* cueBox */
        start local 3 // android.media.WebVttRenderingWidget$CueLayout cueBox
        10: .line 1611
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            aload 3 /* cueBox */
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
        11: .line 1612
            aload 0 /* this */
            aload 3 /* cueBox */
            bipush -2
            bipush -2
            invokevirtual android.media.WebVttRenderingWidget$RegionLayout.addView:(Landroid/view/View;II)V
        12: .line 1614
            aload 0 /* this */
            invokevirtual android.media.WebVttRenderingWidget$RegionLayout.getChildCount:()I
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegion:Landroid/media/TextTrackRegion;
            getfield android.media.TextTrackRegion.mLines:I
            if_icmple 14
        13: .line 1615
            aload 0 /* this */
            iconst_0
            invokevirtual android.media.WebVttRenderingWidget$RegionLayout.removeViewAt:(I)V
        14: .line 1617
      StackMap locals: android.media.WebVttRenderingWidget$RegionLayout android.media.TextTrackCue int android.media.WebVttRenderingWidget$CueLayout
      StackMap stack:
            return
        end local 3 // android.media.WebVttRenderingWidget$CueLayout cueBox
        end local 2 // int cueCount
        end local 1 // android.media.TextTrackCue cue
        end local 0 // android.media.WebVttRenderingWidget$RegionLayout this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   15     0      this  Landroid/media/WebVttRenderingWidget$RegionLayout;
            0   15     1       cue  Landroid/media/TextTrackCue;
            1   15     2  cueCount  I
            2    9     3         i  I
            4    7     4    cueBox  Landroid/media/WebVttRenderingWidget$CueLayout;
           10   15     3    cueBox  Landroid/media/WebVttRenderingWidget$CueLayout;
    MethodParameters:
      Name  Flags
      cue   

  public boolean prune();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=4, args_size=1
        start local 0 // android.media.WebVttRenderingWidget$RegionLayout this
         0: .line 1625
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            invokevirtual java.util.ArrayList.size:()I
            istore 1 /* cueCount */
        start local 1 // int cueCount
         1: .line 1626
            iconst_0
            istore 2 /* i */
        start local 2 // int i
         2: goto 10
         3: .line 1627
      StackMap locals: int int
      StackMap stack:
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            iload 2 /* i */
            invokevirtual java.util.ArrayList.get:(I)Ljava/lang/Object;
            checkcast android.media.WebVttRenderingWidget$CueLayout
            astore 3 /* cueBox */
        start local 3 // android.media.WebVttRenderingWidget$CueLayout cueBox
         4: .line 1628
            aload 3 /* cueBox */
            invokevirtual android.media.WebVttRenderingWidget$CueLayout.isActive:()Z
            ifne 9
         5: .line 1629
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            iload 2 /* i */
            invokevirtual java.util.ArrayList.remove:(I)Ljava/lang/Object;
            pop
         6: .line 1630
            aload 0 /* this */
            aload 3 /* cueBox */
            invokevirtual android.media.WebVttRenderingWidget$RegionLayout.removeView:(Landroid/view/View;)V
         7: .line 1631
            iinc 1 /* cueCount */ -1
         8: .line 1632
            iinc 2 /* i */ -1
        end local 3 // android.media.WebVttRenderingWidget$CueLayout cueBox
         9: .line 1626
      StackMap locals:
      StackMap stack:
            iinc 2 /* i */ 1
      StackMap locals:
      StackMap stack:
        10: iload 2 /* i */
            iload 1 /* cueCount */
            if_icmplt 3
        end local 2 // int i
        11: .line 1636
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegionCueBoxes:Ljava/util/ArrayList;
            invokevirtual java.util.ArrayList.isEmpty:()Z
            ireturn
        end local 1 // int cueCount
        end local 0 // android.media.WebVttRenderingWidget$RegionLayout this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   12     0      this  Landroid/media/WebVttRenderingWidget$RegionLayout;
            1   12     1  cueCount  I
            2   11     2         i  I
            4    9     3    cueBox  Landroid/media/WebVttRenderingWidget$CueLayout;

  public android.media.TextTrackRegion getRegion();
    descriptor: ()Landroid/media/TextTrackRegion;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // android.media.WebVttRenderingWidget$RegionLayout this
         0: .line 1643
            aload 0 /* this */
            getfield android.media.WebVttRenderingWidget$RegionLayout.mRegion:Landroid/media/TextTrackRegion;
            areturn
        end local 0 // android.media.WebVttRenderingWidget$RegionLayout this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Landroid/media/WebVttRenderingWidget$RegionLayout;
}
SourceFile: "WebVttRenderer.java"
NestHost: android.media.WebVttRenderingWidget
InnerClasses:
  private CueLayout = android.media.WebVttRenderingWidget$CueLayout of android.media.WebVttRenderingWidget
  private RegionLayout = android.media.WebVttRenderingWidget$RegionLayout of android.media.WebVttRenderingWidget
  public MeasureSpec = android.view.View$MeasureSpec of android.view.View
  public final CaptionStyle = android.view.accessibility.CaptioningManager$CaptionStyle of android.view.accessibility.CaptioningManager