code: @Override
      public boolean isWriteable(final Class<?> type, final Type genericType, final Annotation[] annotations,
                                 final MediaType mediaType) {
          return type != null
                  && mediaType.getType().equals(MediaType.TEXT_PLAIN_TYPE.getType())
                  && mediaType.getSubtype().equals(MediaType.TEXT_PLAIN_TYPE.getSubtype());
      }
docs: {@inheritDoc}