code: boolean isMultiPartFormData() {
  		for(HttpParameter parameter : parameters) {
  			if(parameter.getType() == Type.FILE) {
  				return true;
  			}
  		}
  		return false;
  	}
docs: Checks if the request has at least one parameter of type FILE,
  which is incompatible with GET requests and must be sent as a
  MIME multipart/form-data.
  
  @return
  whether the request contains FILE parameters.