/** Pointer to the group this node belongs to. */
struct writer_node_group *wng;
/** The writer-specific configuration of this node. */
void *conf;
/** How much of the wng's buffer is already written. */
size_t written;
/** Pointer to the group this node belongs to. */
struct writer_node_group *wng;
/** The writer-specific configuration of this node. */
void *conf;
/** How much of the wng's buffer is already written. */
size_t written;