:memo: Document `BrowserView.getAllViews()`

docs/api/browser-view.md

@@ -40,6 +40,10 @@ view.webContents.loadURL('https://electronjs.org')
 
 ### Static Methods
 
+#### `BrowserView.getAllViews()`
+
+Returns `BrowserView[]` - An array of all opened BrowserViews.
+
 #### `BrowserView.fromId(id)`
 
 * `id` Integer