src/vs/workbench/contrib/notebook/common/notebookDiffEditorInput.ts/NotebookDiffEditorInput/dispose
class NotebookDiffEditorInput:	override dispose() {
		super.dispose();
		this._cachedModel?.dispose();
		this._cachedModel = undefined;
		this.original.dispose();
		this.modified.dispose();
		this._originalTextModel = null;
		this._modifiedTextModel = null;
	}