model(params){
return this.store.findRecord('histogram', params.name).then((result) => {
  result.set('chartData',{
    labels: ['Value 1', 'Value 2', 'Value 3'],
    series: [[71, 46, 59]]});
});

model: function () {
return {
  chartData: {
    labels: ['Value 1', 'Value 2', 'Value 3'],
    series: [[71, 46, 59]]
  }
};