title: Godot how to delete a RigidBody node and its child nodes?
body: <p>Godot engine through gd script </p>
  
  <p>I preload the tscn files and <code>main.add_child(item)</code>. How to delete this <code>RigidBody</code> node and its child nodes (<code>RigidBody</code> node with child nodes: a sprite node and a collider shape node)?</p>