extern submesh_t *lookup_submesh(struct meshlink_handle *mesh, const char *);
extern submesh_t *lookup_or_create_submesh(struct meshlink_handle *mesh, const char *);
extern bool submesh_allows_node(const submesh_t *submesh, const struct node_t *node);
extern submesh_t *lookup_submesh(struct meshlink_handle *mesh, const char *);
extern submesh_t *lookup_or_create_submesh(struct meshlink_handle *mesh, const char *);
extern bool submesh_allows_node(const submesh_t *submesh, const struct node_t *node);