@Override
    public String toString() {
      return MoreObjects.toStringHelper(this).add("key", key)
          .add("find", find)
          .add("replaceWith",replaceWith)
          .add("ifKey", ifKey)
          .add("ifType", ifType)
          .add("ifValue", ifValue)
          .add("ifKeyState", ifKeyState).omitNullValues().toString();
    }
Find as many matching groups as possible and create replacements for each
one. The default value is {@code false}.
ambari-server/src/main/java/org/apache/ambari/server/stack/upgrade/ConfigUpgradeChangeDefinition.java