src/vs/editor/common/config/editorOptions.ts/EditorRenderLineNumbersOption/constructor
class EditorRenderLineNumbersOption:	constructor() {
		super(
			EditorOption.lineNumbers, 'lineNumbers', { renderType: RenderLineNumbersType.On, renderFn: null },
			{
				type: 'string',
				enum: ['off', 'on', 'relative', 'interval'],
				enumDescriptions: [
					nls.localize('lineNumbers.off', "Line numbers are not rendered."),
					nls.localize('lineNumbers.on', "Line numbers are rendered as absolute number."),
					nls.localize('lineNumbers.relative', "Line numbers are rendered as distance in lines to cursor position."),
					nls.localize('lineNumbers.interval', "Line numbers are rendered every 10 lines.")
				],
				default: 'on',
				description: nls.localize('lineNumbers', "Controls the display of line numbers.")
			}
		);
	}