Configuration:
- PDF.js version: 2.0.550

Steps to reproduce the problem:
1. Render document in SVG mode `renderMode="svg"`

What is the expected behavior? (add screenshot)
Rendering annotations same way as they rendered on canvas

What went wrong? (add screenshot)
```
Warning: Unimplemented operator beginAnnotations
Warning: Unimplemented operator endAnnotations
```
return `g_${pdfManager.docId}`;
      }
      static createFontId() {
        return `f${++idCounters.font}`;
      }
      static createObjId() {
        unreachable("Abstract method `createObjId` called.");
      }
      static getPageObjId() {
        unreachable("Abstract method `getPageObjId` called.");
      }
    };
  }
  parse(recoveryMode) {
    this.xref.parse(recoveryMode);
    this.catalog = new Catalog(this.pdfManager, this.xref);
    
    
    
    
    if (this.catalog.version) {
      this._version = this.catalog.version;
    }
  }
  get linearization() {