fix bugs such that JsonCodable works

pkgs/_analyzer_macros/lib/macro_implementation.dart

@@ -170,15 +170,17 @@ class AnalyzerMacroExecutionResult
     if (augmentResponse.typeAugmentations?.isNotEmpty == true) {
       // TODO: Handle multiple type augmentations, or augmentations where the
       // target is itself a member of a type and not the type.
-      final entry = augmentResponse.typeAugmentations!.entries.single;
-      if (entry.key != target.qualifiedName.name) {
-        throw UnimplementedError(
-            'Type augmentations are only implemented when the type is the '
-            'target of the augmentation.');
-      }
-      for (final augmentation in entry.value) {
-        declarations.add(macros_api_v1.DeclarationCode.fromParts(
-            await _resolveNames(augmentation.code)));
+      for (final entry in augmentResponse.typeAugmentations!.entries) {
+        if (entry.key != target.qualifiedName.name) {
+          throw UnimplementedError(
+              'Type augmentations are only implemented when the type is the '
+              'target of the augmentation, expected '
+              '${target.qualifiedName.name} but got ${entry.key}');
+        }
+        for (final augmentation in entry.value) {
+          declarations.add(macros_api_v1.DeclarationCode.fromParts(
+              await _resolveNames(augmentation.code)));
+        }
       }
     }
 

pkgs/_macro_client/lib/src/builder_impls.dart

@@ -322,14 +322,15 @@ Augmentation _buildFunctionAugmentation(
       ';'
     else ...[
       ' ',
-      body,
+      ...body.code,
     ]
   ];
   return Augmentation(code: [
     for (var part in parts)
       switch (part) {
-        Code() => part,
         String() => Code.string(part),
+        // TODO: All maps will pass this check...
+        Code() => part,
         _ => throw StateError('Unexpected code kind $part'),
       },
   ]);

pkgs/dart_model/lib/src/dart_model.dart

@@ -23,7 +23,7 @@ extension QualifiedNameExtension on QualifiedName {
 extension ParentInterface on Member {
   QualifiedName get parentInterface {
     final self = MacroScope.current.model.qualifiedNameOf(node)!;
-    return QualifiedName(uri: self.uri, name: self.name);
+    return QualifiedName(uri: self.uri, name: self.scope);
   }
 }