code: public static boolean isTopLevelScrollItem(Context context, AccessibilityNodeInfoCompat node) {
          if (node == null) {
              return false;
          }
  
          AccessibilityNodeInfoCompat parent = null;
  
          try {
              parent = node.getParent();
              if (parent == null) {
                  // Not a child node of anything.
                  return false;
              }
  
              if (isScrollable(node)) {
                  return true;
              }
  
              // AdapterView, ScrollView, and HorizontalScrollView are focusable
              // containers, but Spinner is a special case.
              // TODO: Rename or break up this method, since it actually returns
              // whether the parent is scrollable OR is a focusable container that
              // should not block its children from receiving focus.
              if (nodeMatchesAnyClassByType(context, parent, android.widget.AdapterView.class,
                      android.widget.ScrollView.class, android.widget.HorizontalScrollView.class,
                      CLASS_TOUCHWIZ_TWADAPTERVIEW)
                      && !nodeMatchesAnyClassByType(context, parent, android.widget.Spinner.class)) {
                  return true;
              }
  
              return false;
          } finally {
              recycleNodes(parent);
          }
      }
docs: Determines whether a node is a top-level item in a scrollable container.
  
  @param node The node to test.
  @return {@code true} if {@code node} is a top-level item in a scrollable
  container.