null_safe_is_black  812 src/itree.c      while (parent != NULL && null_safe_is_black (node))
null_safe_is_black  828 src/itree.c    	  if (null_safe_is_black (other->left) /* 2.a */
null_safe_is_black  829 src/itree.c    	      && null_safe_is_black (other->right))
null_safe_is_black  838 src/itree.c    	      if (null_safe_is_black (other->right)) /* 3.a */
null_safe_is_black  865 src/itree.c    	  if (null_safe_is_black (other->right) /* 2.b */
null_safe_is_black  866 src/itree.c    	      && null_safe_is_black (other->left))
null_safe_is_black  875 src/itree.c    	      if (null_safe_is_black (other->left)) /* 3.b */