| menu | The Scene view context menu to add menu items to. | 
Adds menu items to Scene view context menu.
Refer to MenuUtility for utility functions that add menu items to the Scene view context menu.
public override void PopulateMenu(DropdownMenu menu)
{
    // Add all clipboard operations to the context menu (Cut, Copy, Paste, Delete, and Duplicate).
    ContextMenuUtility.AddClipboardEntriesTo(menu);
    // Add an item to the context menu using a delegate or an EditorAction.
    menu.AppendAction("Parent Item/Child Item", (item) => Debug.Log("Executed Child Item."));
    // Add an item to the context menu using a predefined MenuItem.
    ContextMenuUtility.AddMenuItem(menu, "GameObject/Move To View");
}