Method setChild

fe/src/main/java/org/apache/impala/common/TreeNode.java:50–50

(int index, NodeType n)

  public boolean hasChild(int i) { return children_.size() > i; }
  public void setChild(int index, NodeType n) { children_.set(index, n); }
  public List<NodeType> getChildren() { return children_; }
  public int getChildCount() { return children_.size(); }