code: public MessageAttributeValue withStringListValues(String... stringListValues) {
          if (this.stringListValues == null) {
              setStringListValues(new com.amazonaws.internal.SdkInternalList<String>(stringListValues.length));
          }
          for (String ele : stringListValues) {
              this.stringListValues.add(ele);
          }
          return this;
      }
docs: <p>
  Not implemented. Reserved for future use.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setStringListValues(java.util.Collection)} or {@link #withStringListValues(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param stringListValues
  Not implemented. Reserved for future use.
  @return Returns a reference to this object so that method calls can be chained together.