CollisionPolygon2D editor tool to copy-paste polygon global position

Region.cs

[GlobalClass, Tool]
public partial class Region : CollisionPolygon2D
{
	private List<Vector2> _editorGlobalPolygon;

	/// <summary>
	///		When enabled, the polygon is stored as global space.
	///		When disabled, the global polygon is restored as local space.
	///		This allows workflow: enable property, move position, disable property.
	/// </summary>
	[ExportCategory("CollisionPolygon2D Editor")]
	[Export]
	private bool EditorCopyPastePolygon
	{
		set
		{
			if (!Engine.IsEditorHint() || value == (this._editorGlobalPolygon != null))
				return;

			if (value)
			{
				this._editorGlobalPolygon = this.Polygon.Select(this.ToGlobal).ToList();
			}
			else
			{
				this.Polygon = this._editorGlobalPolygon.Select(this.ToLocal).ToArray();
				this._editorGlobalPolygon = null;
			}
		}
		get => this._editorGlobalPolygon != null;
	}
}