Improved debug console messages

Author: hgraceb

cached_network_image/lib/src/image_provider/cached_network_image_provider.dart

@@ -78,13 +78,10 @@ class CachedNetworkImageProvider
       codec: _loadBufferAsync(key, chunkEvents, decode),
       chunkEvents: chunkEvents.stream,
       scale: key.scale,
-      informationCollector: () sync* {
-        yield DiagnosticsProperty<ImageProvider>(
-          'Image provider: $this \n Image key: $key',
-          this,
-          style: DiagnosticsTreeStyle.errorProperty,
-        );
-      },
+      informationCollector: () => <DiagnosticsNode>[
+        DiagnosticsProperty<ImageProvider>('Image provider', this),
+        DiagnosticsProperty<CachedNetworkImageProvider>('Image key', key),
+      ],
     );
 
     if (errorListener != null) {
@@ -132,13 +129,10 @@ class CachedNetworkImageProvider
       codec: _loadImageAsync(key, chunkEvents, decode),
       chunkEvents: chunkEvents.stream,
       scale: key.scale,
-      informationCollector: () sync* {
-        yield DiagnosticsProperty<ImageProvider>(
-          'Image provider: $this \n Image key: $key',
-          this,
-          style: DiagnosticsTreeStyle.errorProperty,
-        );
-      },
+      informationCollector: () => <DiagnosticsNode>[
+        DiagnosticsProperty<ImageProvider>('Image provider', this),
+        DiagnosticsProperty<CachedNetworkImageProvider>('Image key', key),
+      ],
     );
 
     if (errorListener != null) {