shadows/framework/src/main/java/org/robolectric/shadows/ShadowAccessibilityNodeInfo.java
public void addChild(AccessibilityNodeInfo child) {
    if (children == null) {
      children = new ArrayList<>();
    }

    children.add(child);
    ShadowAccessibilityNodeInfo shadowAccessibilityNodeInfo = Shadow.extract(child);
    shadowAccessibilityNodeInfo.parent = realAccessibilityNodeInfo;
  }
public void addChild(AccessibilityNodeInfo child) {
    if (children == null) {
      children = new ArrayList<>();
    }

    children.add(child);
    ShadowAccessibilityNodeInfo shadowAccessibilityNodeInfo = Shadow.extract(child);
    shadowAccessibilityNodeInfo.parent = realAccessibilityNodeInfo;
  }
Add a child node to this one. Also initializes the parent field of the
child.

@param child The node to be added as a child.