Source terms

#define     GFS_SOURCE(obj)

#define     GFS_IS_SOURCE(obj)

#define     GFS_SOURCE_CLASS(klass)

struct GfsSource {
  /*< private >*/
  GfsEvent parent;

  /*< public >*/
  GfsVariable * v;
};

struct GfsSourceClass;

GfsSourceClass* gfs_source_class            (void);

void        gfs_velocity_sources            (GfsDomain *domain,
                                             GfsAdvectionParams *par);