Given two trees, judge whether they are mirror images of each other

boolean areMirrors(BinaryTreeNode root1,BinaryTreeNode root2){
    
    
  if(root1 == null && root2 == null)
    return true;
  if(root1 == null || root2 == null)
    return false;
  if(root1.getData() != root2.getData())
    return false;
  else
    return areMirrors(root1.getLeft(),root2.getRight())
    && areMirrors(root1.getRight(),root2.getLeft());
};