Problem with function close()

Hello
I have problem with inapp, I want close browser after when event fire. I try use close() but function not working. What Im doing wrong?

This is my code:
const browser = this.inAppBrowser.create(url, '_blank', options);

```
const browser = this.inAppBrowser.create(url, '_self', options);
browser.on("loadstart")
.subscribe(
(e) => {
let u = e.url
if(u.includes("search")) {
alert("Close");
browser.close();


}
},
err => {
console.log("InAppBrowser Loadstop Event Error: " + err);
});
```

No repository file or test is named. Start by checking the InAppBrowser API behavior for create(), the _self target, loadstart, and close(), then reproduce the URL-matching flow; done means determining whether the browser closes when the URL includes "search" and documenting the required usage or confirming a plugin defect.

Written by the indexing model from the issue text.