Am I allowed to use the wire service in an ES module, i.e. a 'headless' utility class?
Or, must I extend `LightningElement` also?

```js
import {wire} from 'lwc';
import sapLogin from '@salesforce/apex/SAPService.login';//cachable=true

export class SapSession
{
    //sessionInfo = undefined;//EDIT oops don't need to declare this
    //the wire below does that

    @wire(sapLogin)sessionInfo

    get Cookie() {
        return sessionInfo.data.Cookies;//delimited string of cookies returned        
    }
    get Error() {
        return sessionInfo.error;//wire failure returns error poperty      
    }
}

```

When I deploy the above class, there are no compilation issues. But, it also doesn't seem to be working in the consuming lwc, either, e.g.

```js
import { LightningElement } from 'lwc';
import { SapSession } from 'c/sapSession';

export default class someUiComponent extends LightningElement {

    session = undefined;

    // One of the standard lifecycle callbacks you can include in an LWC
    connectedCallback() {
        this.session = SapSession;
    }

}

```

> 
> someUiComponent.html
> 
> 
> 

```html
<template>
    <div>
        little test:

        <div if:true={session}>
            <div if:true={session.Cookie}> {session.Cookie}</div>
            <div if:true={session.Error}> {session.Error}</div>
        </div>
    </div>
</template>

```