src/vs/workbench/contrib/notebook/common/notebookOptions.ts/NotebookOptions/getCellCollapseDefault
class NotebookOptions:	getCellCollapseDefault(): NotebookCellDefaultCollapseConfig {
		return this._layoutConfiguration.interactiveWindowCollapseCodeCells === 'never' ?
			{
				codeCell: {
					inputCollapsed: false
				}
			} : {
				codeCell: {
					inputCollapsed: true
				}
			};
	}