this.pieChartOptions = {
            chartType: 'PieChart',
            dataTable: [
              ['Task', 'Hours per Day'],
              ['Work',    11],
              ['Eat',      2],
              ['Commute',  2],
              ['Watch TV', 2],
              ['Sleep',    7]
            ],
            options: {title: 'My Daily Activities'}
          }