ext/h3/src/docs/api/hierarchy.md in h3-3.5.1 vs ext/h3/src/docs/api/hierarchy.md in h3-3.6.0

@@ -24,9 +24,17 @@
 int maxH3ToChildrenSize(H3Index h, int childRes);
 ```
 
 Returns the size of the array needed by `h3ToChildren` for these inputs.
 
+## h3ToCenterChild
+
+```
+H3Index h3ToCenterChild(H3Index h, int childRes);
+```
+
+Returns the center child (finer) index contained by `h` at resolution `childRes`.
+
 ## compact
 
 ```
 int compact(const H3Index *h3Set, H3Index *compactedSet, const int numHexes);
 ```