src/vs/workbench/contrib/webviewView/browser/webviewViewPane.ts/WebviewViewPane/updateTreeVisibility
class WebviewViewPane:	private updateTreeVisibility() {
		if (this.isBodyVisible()) {
			this.activate();
			this._webview.value?.claim(this, undefined);
		} else {
			this._webview.value?.release(this);
		}
	}