Index: trunk/src/org/openstreetmap/josm/data/projection/Projection.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/projection/Projection.java	(revision 12213)
+++ trunk/src/org/openstreetmap/josm/data/projection/Projection.java	(revision 12216)
@@ -54,5 +54,7 @@
      * Get a filename compatible string (for the cache directory).
      * @return the cache directory name (base name)
+     * @deprecated unused - remove in 2017-07
      */
+    @Deprecated
     String getCacheDirectoryName();
 
Index: trunk/src/org/openstreetmap/josm/gui/preferences/projection/AbstractProjectionChoice.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/preferences/projection/AbstractProjectionChoice.java	(revision 12213)
+++ trunk/src/org/openstreetmap/josm/gui/preferences/projection/AbstractProjectionChoice.java	(revision 12216)
@@ -51,4 +51,10 @@
     }
 
+    /**
+     * Get the cache directory name.
+     * @return the cache directory name (base name)
+     * @deprecated unused - remove in 2017-07
+     */
+    @Deprecated
     public String getCacheDir() {
         return cacheDir;