refactor(dynamite): improve code readability

Signed-off-by: Nikolas Rimikis <leptopoda@users.noreply.github.com>

packages/dynamite/dynamite/lib/src/openapi_builder.dart

@@ -1587,8 +1587,12 @@ TypeResult resolveType(
         }
       case 'object':
         if (schema.properties == null) {
-          if (schema.additionalProperties != null) {
-            if (schema.additionalProperties is EmptySchema) {
+          if (schema.additionalProperties == null) {
+            result = TypeResultBase(
+              'JsonObject',
+              nullable: nullable,
+            );
+          } else if (schema.additionalProperties is EmptySchema) {
             result = TypeResultMap(
               'BuiltMap',
               TypeResultBase('JsonObject'),
@@ -1608,23 +1612,13 @@ TypeResult resolveType(
               nullable: nullable,
             );
           }
-            break;
-          }
-          result = TypeResultBase(
-            'JsonObject',
-            nullable: nullable,
-          );
-          break;
-        }
-        if (schema.properties!.isEmpty) {
+        } else if (schema.properties!.isEmpty) {
           result = TypeResultMap(
             'BuiltMap',
             TypeResultBase('JsonObject'),
             nullable: nullable,
           );
-          break;
-        }
-
+        } else {
           result = resolveObject(
             spec,
             variablePrefix,
@@ -1635,6 +1629,7 @@ TypeResult resolveType(
           );
         }
     }
+  }
 
   if (result != null) {
     if (!ignoreEnum && schema.enum_ != null) {