GL_AVLTREE_OSET    32 maint/gnulib/lib/gl_avltreehash_list.c #define OSET_TREE_FLAVOR GL_AVLTREE_OSET
GL_AVLTREE_OSET    96 maint/gnulib/tests/test-avltree_oset.c     set2 = gl_oset_nx_create_empty (GL_AVLTREE_OSET, (gl_setelement_compar_fn) strcmp, NULL);
GL_AVLTREE_OSET   166 maint/gnulib/tests/test-avltree_oset.c   test_update (GL_AVLTREE_OSET);