I created a pdf for https://github.com/mozilla/pdf.js/pull/14023:
[same_fields(1).pdf](https://github.com/mozilla/pdf.js/files/7168340/same_fields.1.pdf)
The 3 checkboxes have the same name (`Check Box2`) and have the same values (`Off` and `Yes`).
In pdf.js, these checkboxes behave like radio buttons in the same group (which is wrong) because of:
https://github.com/mozilla/pdf.js/commit/1fcffe80349a98378262c8a16f7b50ff34c3fe82
Since they've the same values they must be synced: if one is checked (resp. unchecked) then all others are checked (resp. unchecked).
unreachable("Abstract method `AnnotationElement.render` called");
  }
  static get platform() {
    const platform = typeof navigator !== "undefined" ? navigator.platform : "";
    return shadow(this, "platform", {
      isWin: platform.includes("Win"),
      isMac: platform.includes("Mac"),
    });
  }
}
class LinkAnnotationElement extends AnnotationElement {
  constructor(parameters) {
    const isRenderable = !!(
      parameters.data.url ||
      parameters.data.dest ||
      parameters.data.action ||
      parameters.data.isTooltipOnly ||
      (parameters.data.actions &&
        (parameters.data.actions.Action ||
          parameters.data.actions["Mouse Up"] ||
          parameters.data.actions["Mouse Down"]))
    );
    super(parameters, { isRenderable, createQuadrilaterals: true });
  }
  render() {