flutter_webview_plugin/ios/Classes/FlutterWebviewPlugin.h

#import <Flutter/Flutter.h>
#import "WebviewController.h"

static FlutterMethodChannel *channel;

@interface FlutterWebviewPlugin : NSObject<FlutterPlugin>
@property (nonatomic, retain) UIViewController *viewController;
@property (nonatomic, retain) WebviewController *webviewController;
@end