导入ChartDataSets时，line-chart.component.ts上出现错误消息

'chart.js' has no exported member named 'ChartDataSets'. Did you mean 'ChartDataset'?

我不明白问题出在哪里？我忘记安装库了？
我的代码在line-chart.component.ts上是这样显示的

import { Component, } from '@angular/core';
import { ChartDataSets, ChartOptions } from 'chart.js';
import { Color, Label } from 'ng2-charts';
@Component({
  selector: 'app-line-chart',
  templateUrl: './line-chart.component.html',
  styleUrls: ['./line-chart.component.css']
})
export class LineChartComponent {
  lineChartData: ChartDataSets[] = [
    { data: [85, 72, 78, 75, 77, 75], label: 'Crude oil prices' },
  ];
  lineChartLabels: Label[] = ['January', 'February', 'March', 'April', 'May', 'June'];
  lineChartOptions = {
    responsive: true,
  };
  lineChartColors: Color[] = [
    {
      borderColor: 'black',
      backgroundColor: 'rgba(255,255,0,0.28)',
    },
  ];
  lineChartLegend = true;
  lineChartPlugins = [];
  lineChartType = 'line';
}

在line-chart.component.html上，我有以下代码：

<div class="chart-wrapper">
    <canvas baseChart 
        [datasets]="lineChartData" 
        [labels]="lineChartLabels" 
        [options]="lineChartOptions"
        [colors]="lineChartColors" 
        [legend]="lineChartLegend" 
        [chartType]="lineChartType" 
        [plugins]="lineChartPlugins">
    </canvas>
</div>

然后在app.module.ts上

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { ChartsModule } from 'ng2-charts';
import { AppComponent } from './app.component';
import { LineChartComponent } from './line-chart/line-chart.component';
@NgModule({
  declarations: [
    AppComponent,
    LineChartComponent
  ],
  imports: [
    BrowserModule,
    ChartsModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

我预先感谢你的帮助。