src/vs/editor/browser/viewParts/minimap/minimap.ts/RenderData/linesEquals
class RenderData:	public linesEquals(layout: MinimapLayout): boolean {
		if (!this.scrollEquals(layout)) {
			return false;
		}

		const tmp = this._renderedLines._get();
		const lines = tmp.lines;
		for (let i = 0, len = lines.length; i < len; i++) {
			if (lines[i].dy === -1) {
				// This line is invalid
				return false;
			}
		}

		return true;
	}