code: public MultipartConfigElement createMultipartConfig() {
  		MultipartConfigFactory factory = new MultipartConfigFactory();
  		PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
  		map.from(this.fileSizeThreshold).to(factory::setFileSizeThreshold);
  		map.from(this.location).whenHasText().to(factory::setLocation);
  		map.from(this.maxRequestSize).to(factory::setMaxRequestSize);
  		map.from(this.maxFileSize).to(factory::setMaxFileSize);
  		return factory.createMultipartConfig();
  	}
docs: Create a new {@link MultipartConfigElement} using the properties.
  @return a new {@link MultipartConfigElement} configured using there properties