Add protocol

Headers/AppKit/NSSeguePerforming.h

@@ -0,0 +1,54 @@
+/* Definition of class NSSeguePerforming
+   Copyright (C) 2020 Free Software Foundation, Inc.
+   
+   By: Gregory Casamento
+   Date: Mon Jan 20 20:24:50 EST 2020
+
+   This file is part of the GNUstep Library.
+   
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+   
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110 USA.
+*/
+
+#ifndef _NSSeguePerforming_h_GNUSTEP_GUI_INCLUDE
+#define _NSSeguePerforming_h_GNUSTEP_GUI_INCLUDE
+
+#import <AppKit/NSStoryboardSegue.h>
+
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_10, GS_API_LATEST)
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+@protocol NSSeguePerforming
+- (void)performSegueWithIdentifier:(NSStoryboardSegueIdentifier)identifier 
+                            sender:(id)sender;
+
+- (void)prepareForSegue:(NSStoryboardSegue *)segue 
+                 sender:(id)sender;
+
+- (BOOL)shouldPerformSegueWithIdentifier:(NSStoryboardSegueIdentifier)identifier 
+                                  sender:(id)sender;
+@end
+
+#if	defined(__cplusplus)
+}
+#endif
+
+#endif	/* GS_API_MACOSX */
+
+#endif	/* _NSSeguePerforming_h_GNUSTEP_GUI_INCLUDE */
+