2.1.1 ChartData object

Represents the data in an activity chart.

Field	Type	Description
`title` required	String	The chart title.
`subTitle` required	String	The chart subtitle.
`counts` required	List of integers	The data.
`startDate` required	Date	The start date and time.
`intervalMs` required	Integer	The interval between items in milliseconds.
`data` required	List of list of integers	The chart data.