在Angular中声明ImageObject格式的在哪里？

import { Component } from '@angular/core';

interface ImageObject {
  src: string;
  alt: string;
}

@Component({
  selector: 'app-image',
  template: `
    <img [src]="image.src" [alt]="image.alt">
  `
})
export class ImageComponent {
  image: ImageObject = {
    src: 'path/to/image.jpg',
    alt: 'Image description'
  };
}