src/vs/editor/browser/viewParts/minimap/minimap.ts/InnerMinimap/onLinesChanged
class InnerMinimap:	public onLinesChanged(changeFromLineNumber: number, changeCount: number): boolean {
		if (this._lastRenderData) {
			return this._lastRenderData.onLinesChanged(changeFromLineNumber, changeCount);
		}
		return false;
	}