Godot 4 extensions for Node.

NodeExtensions.cs

using Godot;

public static class NodeExtensions
{
    public static void RemoveAndFree(this Node node)
    {
        Node parent = node.GetParent();
        if (!GodotObject.IsInstanceValid(parent))
            return;

        parent.RemoveChild(node);
        node.QueueFree();
    }

    public static T GetNodeOfType<T>(this Node node) where T : Node
    {
        foreach (Node child in node.GetChildren())
        {
            if (child is T typedNode)
                return typedNode;
        }

        return null;
    }

    public static T GetAncestorOfType<T>(this Node node) where T : Node
    {
        Node parent = node.GetParent();
        while (parent != null)
        {
            if (parent is T typedNode)
                return typedNode;

            parent = parent.GetParent();
        }

        return null;
    }

    public static SignalAwaiter WaitOneFrame(this Node node)
    {
        return node.ToSignal(node.GetTree(), SceneTree.SignalName.ProcessFrame);
    }
}