From a135938ab651d3a968ce6391541ff8c3f55d723f Mon Sep 17 00:00:00 2001
From: zav8 <zav8@qq.com>
Date: Tue, 24 Sep 2019 16:21:19 +0800
Subject: [PATCH] A wrong variable in assignment?

I'am new to flutter, but what does this `String ` mean in line 192:
` contentType: String ?? this.contentType,`?
This lead to an error after I called `merge()`.
---
 dio/lib/src/options.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dio/lib/src/options.dart b/dio/lib/src/options.dart
index b69d03fc8..5ab67bc7f 100644
--- a/dio/lib/src/options.dart
+++ b/dio/lib/src/options.dart
@@ -189,7 +189,7 @@ class Options extends _RequestConfig {
       extra: extra ?? Map.from(this.extra ?? {}),
       headers: headers ?? Map.from(this.headers ?? {}),
       responseType: responseType ?? this.responseType,
-      contentType: String ?? this.contentType,
+      contentType: contentType ?? this.contentType,
       validateStatus: validateStatus ?? this.validateStatus,
       receiveDataWhenStatusError:
           receiveDataWhenStatusError ?? this.receiveDataWhenStatusError,