/usr/include/libgda-4.0/libgda/virtual/gda-vconnection-hub.h is in libgda-4.0-dev 4.2.8-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | /* GDA
 * Copyright (C) 2007 - 2009 The GNOME Foundation.
 *
 * AUTHORS:
 *      Vivien Malerba <malerba@gnome-db.org>
 *
 * This Library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public License as
 * published by the Free Software Foundation; either version 2 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 Library General Public
 * License along with this Library; see the file COPYING.LIB.  If not,
 * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
#ifndef __GDA_VCONNECTION_HUB_H__
#define __GDA_VCONNECTION_HUB_H__
#include <virtual/gda-vconnection-data-model.h>
#define GDA_TYPE_VCONNECTION_HUB            (gda_vconnection_hub_get_type())
#define GDA_VCONNECTION_HUB(obj)            (G_TYPE_CHECK_INSTANCE_CAST (obj, GDA_TYPE_VCONNECTION_HUB, GdaVconnectionHub))
#define GDA_VCONNECTION_HUB_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST (klass, GDA_TYPE_VCONNECTION_HUB, GdaVconnectionHubClass))
#define GDA_IS_VCONNECTION_HUB(obj)         (G_TYPE_CHECK_INSTANCE_TYPE (obj, GDA_TYPE_VCONNECTION_HUB))
#define GDA_IS_VCONNECTION_HUB_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDA_TYPE_VCONNECTION_HUB))
G_BEGIN_DECLS
typedef struct _GdaVconnectionHub      GdaVconnectionHub;
typedef struct _GdaVconnectionHubClass GdaVconnectionHubClass;
typedef struct _GdaVconnectionHubPrivate GdaVconnectionHubPrivate;
typedef void (*GdaVConnectionHubFunc) (GdaConnection *cnc, const gchar *ns, gpointer data);
struct _GdaVconnectionHub {
	GdaVconnectionDataModel      parent;
	GdaVconnectionHubPrivate    *priv;
};
struct _GdaVconnectionHubClass {
	GdaVconnectionDataModelClass parent_class;
	/* Padding for future expansion */
	void (*_gda_reserved1) (void);
	void (*_gda_reserved2) (void);
	void (*_gda_reserved3) (void);
	void (*_gda_reserved4) (void);
};
GType               gda_vconnection_hub_get_type       (void) G_GNUC_CONST;
gboolean            gda_vconnection_hub_add            (GdaVconnectionHub *hub, 
							GdaConnection *cnc, const gchar *ns, GError **error);
gboolean            gda_vconnection_hub_remove         (GdaVconnectionHub *hub, GdaConnection *cnc, GError **error);
GdaConnection      *gda_vconnection_hub_get_connection (GdaVconnectionHub *hub, const gchar *ns);
void                gda_vconnection_hub_foreach        (GdaVconnectionHub *hub, 
							GdaVConnectionHubFunc func, gpointer data);
G_END_DECLS
#endif
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