GST_IS_PRESET     877 gst/gstpreset.c   g_return_val_if_fail (GST_IS_PRESET (preset), NULL);
GST_IS_PRESET     895 gst/gstpreset.c   g_return_val_if_fail (GST_IS_PRESET (preset), NULL);
GST_IS_PRESET     914 gst/gstpreset.c   g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
GST_IS_PRESET     935 gst/gstpreset.c   g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
GST_IS_PRESET     958 gst/gstpreset.c   g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
GST_IS_PRESET     980 gst/gstpreset.c   g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
GST_IS_PRESET    1005 gst/gstpreset.c   g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
GST_IS_PRESET    1031 gst/gstpreset.c   g_return_val_if_fail (GST_IS_PRESET (preset), FALSE);
GST_IS_PRESET     155 tests/check/gst/gstpreset.c   fail_unless (GST_IS_PRESET (elem));