src/vs/editor/browser/viewParts/minimap/minimap.ts/InnerMinimap/_getMinimapDomNodeClassName
class InnerMinimap:	private _getMinimapDomNodeClassName(): string {
		const class_ = ['minimap'];
		if (this._model.options.showSlider === 'always') {
			class_.push('slider-always');
		} else {
			class_.push('slider-mouseover');
		}
		if (this._model.options.autohide) {
			class_.push('autohide');
		}

		return class_.join(' ');
	}