diff --git a/src/com/sap/piper/MapUtils.groovy b/src/com/sap/piper/MapUtils.groovy
index 5f8123b9a..d3cd32956 100644
--- a/src/com/sap/piper/MapUtils.groovy
+++ b/src/com/sap/piper/MapUtils.groovy
@@ -63,6 +63,13 @@ class MapUtils implements Serializable {
         m.putAll(updates)
     }
 
+    /*
+     * Provides a new map with the same content like the original map.
+     * Nested Collections and Maps are copied. Values with are not
+     * Collections/Maps are not copied/cloned.
+     * <paranoia>&/ltThe keys are also not copied/cloned, even if they are
+     * Maps or Collections;paranoia>
+     */
     static deepCopy(Map original) {
         Map copy = [:]
         for (def e : original.entrySet()) {
@@ -75,14 +82,14 @@ class MapUtils implements Serializable {
         copy
     }
 
-    static deepCopy(Set original) {
+    /* private */ static deepCopy(Set original) {
         Set copy = []
         for(def e : original)
             copy << deepCopy(e)
         copy
     }
 
-    static deepCopy(List original) {
+    /* private */ static deepCopy(List original) {
         List copy = []
         for(def e : original)
             copy << deepCopy(e)
@@ -93,7 +100,7 @@ class MapUtils implements Serializable {
      * In fact not a copy, but a catch all for everything not matching
      * with the other signatures
      */
-    static deepCopy(def original) {
+    /* private */ static deepCopy(def original) {
         original
     }
 }