#define TAPER_SOURCE(obj) G_TYPE_CHECK_INSTANCE_CAST((obj), taper_source_get_type(), TaperSource)
#define TAPER_SOURCE_CONST(obj) G_TYPE_CHECK_INSTANCE_CAST((obj), taper_source_get_type(), TaperSource const)
#define TAPER_SOURCE_CLASS(klass) G_TYPE_CHECK_CLASS_CAST((klass), taper_source_get_type(), TaperSourceClass)
#define TAPER_SOURCE(obj) G_TYPE_CHECK_INSTANCE_CAST((obj), taper_source_get_type(), TaperSource)
#define TAPER_SOURCE_CONST(obj) G_TYPE_CHECK_INSTANCE_CAST((obj), taper_source_get_type(), TaperSource const)
#define TAPER_SOURCE_CLASS(klass) G_TYPE_CHECK_CLASS_CAST((klass), taper_source_get_type(), TaperSourceClass)