add docs

packages/webview_flutter/webview_flutter_wkwebview/darwin/webview_flutter_wkwebview/Sources/webview_flutter_wkwebview/WebKitLibrary.g.swift

@@ -7283,6 +7283,7 @@ final class PigeonApiSecTrust: PigeonApiProtocolSecTrust {
   }
 }
 protocol PigeonApiDelegateSecCertificate {
+  /// Returns a DER representation of a certificate given a certificate object.
   func copyData(pigeonApi: PigeonApiSecCertificate, certificate: SecCertificateWrapper) throws
     -> FlutterStandardTypedData
 }

packages/webview_flutter/webview_flutter_wkwebview/lib/src/common/web_kit.g.dart

@@ -8454,6 +8454,7 @@ class SecCertificate extends NSObject {
     }
   }
 
+  /// Returns a DER representation of a certificate given a certificate object.
   static Future<Uint8List> copyData(
     SecCertificate certificate, {
     BinaryMessenger? pigeon_binaryMessenger,

packages/webview_flutter/webview_flutter_wkwebview/pigeons/web_kit.dart

@@ -1218,6 +1218,7 @@ abstract class SecTrust extends NSObject {
 /// See https://developer.apple.com/documentation/security/seccertificate.
 @ProxyApi(swiftOptions: SwiftProxyApiOptions(name: 'SecCertificateWrapper'))
 abstract class SecCertificate extends NSObject {
+  /// Returns a DER representation of a certificate given a certificate object.
   @static
   Uint8List copyData(SecCertificate certificate);
 }