title: gvisAnnotationChart and zoomStartTime / zoomEndTime
body: <p>I'm having some trouble with the zoomStartTime and zoomEndTime parameters of gvisAnnotationChart from the googleVis package.</p>
  
  <p>Specifically, running example three:</p>
  
  <pre><code>A3 &lt;- gvisAnnotationChart(Stock, datevar="Date",
                             numvar="Value", idvar="Device",
                             titlevar="Title", annotationvar="Annotation",
                             options=list(
                               width=600, height=350,
                              zoomStartTime=as.Date("2008-01-04"),
                              zoomEndTime=as.Date("2008-01-05"))
                            )
  plot(A3)
  </code></pre>
  
  <p>Produces a plot with "undefined is not a function" in the y scroll area.</p>
  
  <p>The documentation states "Zoom into the time window, no Y-axis ticks" but has no other information. 
  I have seen several examples on JSFiddle of this working, <a href="https://stackoverflow.com/questions/6483801/configuring-google-annotated-timeline">Configuring Google Annotated Timeline</a>,
  but I can't translate this to R. Any help would be appreciated.  </p>