rokojori_action_library/Runtime/UI/Actions/SetUIStyle.cs

using Godot;
using System;

namespace Rokojori;

[Tool,GlobalClass]
public partial class SetUIStyle: Action
{ 
  [Export]
  public Control uiNode;

  [Export]
  public UIStyle style;

  protected override void _OnTrigger()
  {
    var uiStyleable = uiNode as UIStylePropertyContainer;

    if ( uiStyleable == null )
    {
      return;
    }

    uiStyleable.SetUIStyleParent( style );
  }
}