code: function applyRequestInterceptors(config) {
  				for (var i = 0; i < interceptors.length; i++) {
  					var interceptor = getInterceptor(interceptors[i]);
  					if (interceptor.request) {
  						config = interceptor.request(config);
  					}
  				}
  				if (config.transformRequest) {
  					config.data = applyTransform(config.data, config.headers, undefined, config.transformRequest);
  				}
  				return config;
  			}
docs: Apply request interceptors in forward order
  @param config
  @returns {*}