Polymer 2.0 Call Child Event From Parent

I keep running into bad examples or outdated 1.0 docs regarding calling child event from the parent in Polymer 2.0. Essentially all I want to accomplish is triggering a child even

Solution 1:

Give an id to

<child-element id="childEl"></child-element>

And fire child element function at parent like:

this.$.childEl.childEvent();

Solution 2:

This is how my template of polymer 3.0 component looks like.

 static get template() {
     return html`
       <my-component id="myComponent" />
     `
 }

And now to call any method in my component class, I do it like this.

  this.$.myComponent.myMethod();

Here myComponent after $ is the id of my-component.