src/vs/workbench/contrib/notebook/browser/contrib/clipboard/notebookClipboard.ts/NotebookClipboardContribution/constructor
class NotebookClipboardContribution:	constructor(@IEditorService private readonly _editorService: IEditorService) {
		super();

		const PRIORITY = 105;

		if (CopyAction) {
			this._register(CopyAction.addImplementation(PRIORITY, 'notebook-clipboard', accessor => {
				return this.runCopyAction(accessor);
			}));
		}

		if (PasteAction) {
			this._register(PasteAction.addImplementation(PRIORITY, 'notebook-clipboard', accessor => {
				return this.runPasteAction(accessor);
			}));
		}

		if (CutAction) {
			this._register(CutAction.addImplementation(PRIORITY, 'notebook-clipboard', accessor => {
				return this.runCutAction(accessor);
			}));
		}
	}