src/vs/workbench/contrib/notebook/browser/view/cellParts/cellProgressBar.ts/CellProgressBar/constructor
class CellProgressBar:	constructor(
		editorContainer: HTMLElement,
		collapsedInputContainer: HTMLElement,
		@INotebookExecutionStateService private readonly _notebookExecutionStateService: INotebookExecutionStateService) {
		super();

		this._progressBar = this._register(new ProgressBar(editorContainer, defaultProgressBarStyles));
		this._progressBar.hide();

		this._collapsedProgressBar = this._register(new ProgressBar(collapsedInputContainer, defaultProgressBarStyles));
		this._collapsedProgressBar.hide();
	}