rk0cc
diff --git a/‎CHANGELOG.md
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diff --git a/‎lib/github_colour.dart
Lines changed: 6 additions & 15 deletions b/‎lib/github_colour.dart
Lines changed: 6 additions & 15 deletions
diff --git a/‎lib/src/cache/exception.dart
Lines changed: 4 additions & 1 deletion b/‎lib/src/cache/exception.dart
Lines changed: 4 additions & 1 deletion
diff --git a/‎lib/src/exception.dart
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diff --git a/‎pubspec.yaml
Lines changed: 1 addition & 1 deletion b/‎pubspec.yaml
Lines changed: 1 addition & 1 deletion
@@ -1,3 +1,7 @@
+## 1.2.2
+
+* Exceptions arrangment.
+
 ## 1.2.1+1
 
 * Remove unused package.
 
@@ -13,35 +13,25 @@ import 'package:meta/meta.dart' show sealed;
 
 import 'src/cache/cache.dart';
 import 'src/cache/exception.dart';
+import 'src/exception.dart';
 
 export 'src/cache/exception.dart';
+export 'src/exception.dart';
 
 const String _src =
     "https://raw.githubusercontent.com/ozh/github-colors/master/colors.json";
 
 /// A handler when no language data found in [GitHubColour.find].
 typedef LanguageUndefinedHandler = Color Function();
 
-/// An [Error] that can not fetch [GitHubColour] data.
-abstract class GitHubColourLoadFailedError extends Error {
-  final String _message;
-
-  GitHubColourLoadFailedError._(
-      [this._message =
-          "There are some unexpected error when loading resources."]);
-
-  @override
-  String toString() => _message;
-}
-
 /// An [Error] thrown when response unsuccessfully and no cache can be used.
 class GitHubColourHTTPLoadFailedError extends GitHubColourLoadFailedError {
   /// HTTP response code when fetching colour data.
   final int responseCode;
 
   GitHubColourHTTPLoadFailedError._(this.responseCode)
       : assert(responseCode != 200),
-        super._();
+        super();
 
   @override
   String toString() =>
@@ -50,15 +40,16 @@ class GitHubColourHTTPLoadFailedError extends GitHubColourLoadFailedError {
 
 /// An [Error] thrown when no resources available to initalize [GitHubColour].
 class GitHubColourNoAvailableResourceError extends GitHubColourLoadFailedError {
-  GitHubColourNoAvailableResourceError._() : super._();
+  GitHubColourNoAvailableResourceError._() : super();
 
   @override
   String toString() =>
       "GitHubColourNoAvailableResourceError: Unable to read GitHub colour data with all available sources.";
 }
 
 /// An [Error] when no colour data of the language.
-class UndefinedLanguageColourError extends ArgumentError {
+class UndefinedLanguageColourError extends ArgumentError
+    implements GitHubColourLoadFailedError {
   /// Undefined language name.
   final String undefinedLanguage;
 
 
@@ -1,6 +1,9 @@
+import '../exception.dart';
+
 /// An [Error] when detected the cache file has been modified when getting
 /// online resource failed.
-class GitHubColourCacheChecksumMismatchedError extends AssertionError {
+class GitHubColourCacheChecksumMismatchedError extends AssertionError
+    implements GitHubColourLoadFailedError {
   /// Construct an [Error] for checksum mismatched.
   GitHubColourCacheChecksumMismatchedError()
       : super("The cache file has unexpected modifications.");
 
@@ -0,0 +1,11 @@
+/// An [Error] that can not fetch [GitHubColour] data.
+abstract class GitHubColourLoadFailedError extends Error {
+  final message;
+
+  GitHubColourLoadFailedError(
+      [this.message =
+          "There are some unexpected error when loading resources."]);
+
+  @override
+  String toString() => message;
+}
@@ -1,6 +1,6 @@
 name: github_colour
 description: Receive ozh's GitHub colour to Flutter's colour implementation with caching and fallback.
-version: 1.2.1+1
+version: 1.2.2
 homepage: https://www.rk0cc.xyz
 repository: https://github.com/rk0cc/github_colour_flutter
 environment: