GENRADIX_ARY
#define GENRADIX_ARY_SHIFT ilog2(GENRADIX_ARY)
struct genradix_node *children[GENRADIX_ARY];
(GENRADIX_ARY - 1);
if (i == GENRADIX_ARY)
(GENRADIX_ARY - 1);
for (i = 0; i < GENRADIX_ARY; i++)