null_safe_is_red  602 src/itree.c      while (null_safe_is_red (node->parent))
null_safe_is_red  614 src/itree.c    	  if (null_safe_is_red (uncle)) /* case 1.a */
null_safe_is_red  644 src/itree.c    	  if (null_safe_is_red (uncle)) /* case 1.b */