This can be used as a value object for incoming/outgoing request/responses
of the multipart/form-data mime type. Parts are marshalled to and from
properties of the value object annotated with the JAX-RS @FormParam
anntotation.
When using the form class as input, you must put @FormParam annotations
on either fields or setter methods.
When using this form class as output, you must put @FormParam
annotations on either fields or getter methods.