code: public AddAttributesActivity withAttributes(java.util.Map<String, String> attributes) {
          setAttributes(attributes);
          return this;
      }
docs: <p>
  A list of 1-50 "AttributeNameMapping" objects that map an existing attribute to a new attribute.
  </p>
  <note>
  <p>
  The existing attributes remain in the message, so if you want to remove the originals, use
  "RemoveAttributeActivity".
  </p>
  </note>
  
  @param attributes
  A list of 1-50 "AttributeNameMapping" objects that map an existing attribute to a new attribute.</p>
  <note>
  <p>
  The existing attributes remain in the message, so if you want to remove the originals, use
  "RemoveAttributeActivity".
  </p>
  @return Returns a reference to this object so that method calls can be chained together.