code: @Deprecated
      public void addMultiValuesForKey(final String key, final ArrayList<String> values) {
          CleverTapAPI cleverTapAPI = weakReference.get();
          if (cleverTapAPI == null) {
              Logger.d("CleverTap Instance is null.");
          } else {
              cleverTapAPI.addMultiValuesForKey(key, values);
          }
      }
docs: Add a collection of unique values to a multi-value user profile property
  If the property does not exist it will be created
  <p/>
  Max 100 values, on reaching 100 cap, oldest value(s) will be removed.
  Values must be Strings and are limited to 512 characters.
  <p/>
  If the key currently contains a scalar value, the key will be promoted to a multi-value property
  with the current value cast to a string and the new value(s) added
  
  @param key    String
  @param values {@link ArrayList} with String values
  @deprecated use {@link CleverTapAPI#addMultiValuesForKey(String key, ArrayList values)}