};
/**
- * Determine all y-axes.
+ * Determine properties of the y axes. These include the number of axes and
+ * data series/styles associated with each. This does not compute the range of
+ * each axis, since that can only be determined when drawing.
* Returns [ axes, seriesToAxisMap ]
* axes = [ { options } ]
* seriesToAxisMap = { seriesName: 0, seriesName2: 1, ... }