upgrade/v2212-Developer-Upgrade-Guide.md

@@ -73,6 +73,13 @@ access method that express the coding intent more clearly:
   confused with two-parameter version
 - test(label) : naming as per bitSet, boolList, labelHashSet
 
+### `writeFile`
+
+The `createFile` methods are deprecated for:
+
+- `newFileAtTime(const word&, scalar)` : same with `createFile(const word&, scalar)`
+- `newFileAtStartTime(const word&)` : same with `createFile(const word&)`
+
 
 ## Base classes/container improvements