I'm getting errors with the index type of the symbol. Want to go with the existing test and perhaps you can add changes if appropriate after?

I'm getting errors with the index type of the symbol. Want to go with the existing test and perhaps you can add changes if appropriate after?

I was able to get the test to pass like this:

  it("serializes as JSON with raw log", () => {
    const ce = new CloudEvent({ ...fixture, data: { lunch: "tacos" } });
    const sym = (Symbol.for("nodejs.util.inspect.custom") as unknown) as string;
    const f = (ce[sym] as CallableFunction).bind(ce);
    expect(ce.toString()).to.deep.equal(f());
  });

Also, to eliminate the warnings that are being generated, the CE function should look like this (note {string} in the @return jsdoc annotation, and the : string return annotation on the function declaration):

  /**
   * The native `console.log` value of the CloudEvent.
   * @return {string} The string representation of the CloudEvent.
   */
  [Symbol.for("nodejs.util.inspect.custom")](): string {
    return this.toString();
  }

Great, thanks @lance. PTAL.