message: [hotfix] Trends example slice is broken
diff: @@ -996,7 +996,7 @@ class NVD3DualLineViz(NVD3Viz):
  "classed": classed,
  "values": [
  {'x': ds, 'y': ys[ds] if ds in ys else None}
  - for ds in df[DTTM_ALIAS]
  + for ds in df.index
  ],
  "yAxis": i+1,
  "type": "line"
  