src/vs/workbench/contrib/notebook/browser/viewModel/codeCellViewModel.ts/CodeCellViewModel/onDidChangeTextModelContent
class CodeCellViewModel:	protected onDidChangeTextModelContent(): void {
		if (this.getEditState() !== CellEditState.Editing) {
			this.updateEditState(CellEditState.Editing, 'onDidChangeTextModelContent');
			this._onDidChangeState.fire({ contentChanged: true });
		}
	}