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 shadow(this, "CHUNK_SIZE_ABOUT", OperatorList.CHUNK_SIZE - 5);
  }
  constructor(intent, streamSink) {
    this._streamSink = streamSink;
    this.fnArray = [];
    this.argsArray = [];
    if (streamSink && intent !== "oplist") {
      this.optimizer = new QueueOptimizer(this);
    } else {
      this.optimizer = new NullOptimizer(this);
    }
    this.dependencies = new Set();
    this._totalLength = 0;
    this.weight = 0;
    this._resolved = streamSink ? null : Promise.resolve();
  }
  get length() {
    return this.argsArray.length;
  }
  get ready() {
    return this._resolved || this._streamSink.ready;
  }
  /**
   * @type {number} The total length of the entire operator list, since
   *                `this.length === 0` after flushing.
   */
  get totalLength() {