[Question] Method call from parent

I think I misunderstood some fundamental: I want to know, how can I call a method from a child component in a parent component, especially when use it in a list?

```js
{this.items.map((item) => {
let textRef // does not work
return (

Refs only work with dom nodes.
Store solution with observe (for calling a method) or props with observe are an overkill for a simple method call.

The issue contains no file or test references. Start from the JSX list example and inspect how Child refs, DOM refs, and observe/props are currently handled; define a supported parent-to-child method-call pattern for each list item and document or test the resulting behavior.

Written by the indexing model from the issue text.