如何将标题添加到我的NG2图表条形图

import { Component, OnInit, AfterViewInit } from '@angular/core';
import { ChartDataSets, ChartOptions } from 'chart.js';
import { Color, Label } from 'ng2-charts';

@Component({
  selector: 'app-bar-chart',
  templateUrl: './bar-chart.component.html',
  styleUrls: ['./bar-chart.component.css']
})
export class BarChartComponent implements OnInit, AfterViewInit {
  public barChartOptions: ChartOptions = {
    responsive: true,
    title: {
      display: true,
      text: 'My Bar Chart Title' // 设置图表的标题
    }
  };
  public barChartLabels: Label[] = ['January', 'February', 'March', 'April', 'May', 'June', 'July'];
  public barChartType: string = 'bar';
  public barChartLegend: boolean = true;
  public barChartData: ChartDataSets[] = [
    { data: [65, 59, 80, 81, 56, 55, 40], label: 'Series A' },
    { data: [28, 48, 40, 19, 86, 27, 90], label: 'Series B' }
  ];

  constructor() { }

  ngOnInit() {
    // 初始化图表的数据和配置
  }

  ngAfterViewInit() {
    // 创建和渲染图表
  }

  updateChart() {
    // 更新图表的数据和配置
  }
}