diff --git a/drv/ArrayMap.drv b/drv/ArrayMap.drv
index 1542daba..9e104a11 100644
--- a/drv/ArrayMap.drv
+++ b/drv/ArrayMap.drv
@@ -49,20 +49,20 @@ public class ARRAY_MAP KEY_VALUE_GENERIC extends ABSTRACT_MAP KEY_VALUE_GENERIC
 
 	private static final long serialVersionUID = 1L;
 	/** The keys (valid up to {@link #size}, excluded). */
-	private transient KEY_TYPE[] key;
+	protected transient KEY_TYPE[] key;
 	/** The values (parallel to {@link #key}). */
-	private transient VALUE_TYPE[] value;
+	protected transient VALUE_TYPE[] value;
 	/** The number of valid entries in {@link #key} and {@link #value}. */
-	private int size;
+	protected int size;
 
 	/** Cached set of entries. */
-	private transient FastEntrySet KEY_VALUE_GENERIC entries;
+	protected transient FastEntrySet KEY_VALUE_GENERIC entries;
 
 	/** Cached set of keys. */
-	private transient SET KEY_GENERIC keys;
+	protected transient SET KEY_GENERIC keys;
 
 	/** Cached collection of values. */
-	private transient VALUE_COLLECTION VALUE_GENERIC values;
+	protected transient VALUE_COLLECTION VALUE_GENERIC values;
 
 	/** Creates a new empty array map with given key and value backing arrays. The resulting map will have as many entries as the given arrays.
 	 *
diff --git a/drv/ArraySet.drv b/drv/ArraySet.drv
index 916faede..0027a69b 100644
--- a/drv/ArraySet.drv
+++ b/drv/ArraySet.drv
@@ -37,9 +37,9 @@ public class ARRAY_SET KEY_GENERIC extends ABSTRACT_SET KEY_GENERIC implements j
 
 	private static final long serialVersionUID = 1L;
 	/** The backing array (valid up to {@link #size}, excluded). */
-	private transient KEY_TYPE[] a;
+	protected transient KEY_TYPE[] a;
 	/** The number of valid entries in {@link #a}. */
-	private int size;
+	protected int size;
 
 	/** Creates a new array set using the given backing array. The resulting set will have as many elements as the array.
 	 *