static void
gth_metadata_provider_file_class_init (GthMetadataProviderFileClass *klass)
{
	parent_class = g_type_class_peek_parent (klass);

	GTH_METADATA_PROVIDER_CLASS (klass)->can_read = gth_metadata_provider_file_can_read;
	GTH_METADATA_PROVIDER_CLASS (klass)->read = gth_metadata_provider_file_read;
}
static void
gth_metadata_provider_image_class_init (GthMetadataProviderImageClass *klass)
{
	GthMetadataProviderClass *metadata_provider_class;

	metadata_provider_class = GTH_METADATA_PROVIDER_CLASS (klass);
	metadata_provider_class->can_read = gth_metadata_provider_image_can_read;
	metadata_provider_class->read = gth_metadata_provider_image_read;
}
static void
gth_metadata_provider_comment_class_init (GthMetadataProviderCommentClass *klass)
{
	GthMetadataProviderClass *mp_class;

	mp_class = GTH_METADATA_PROVIDER_CLASS (klass);
	mp_class->can_read = gth_metadata_provider_comment_can_read;
	mp_class->can_write = gth_metadata_provider_comment_can_write;
	mp_class->read = gth_metadata_provider_comment_read;
	mp_class->write = gth_metadata_provider_comment_write;
}