Minor fixes

Author: inputfalken

src/DynamoDBGenerator.SourceGenerator/Generations/AttributeExpressionName.cs

@@ -1,4 +1,3 @@
-using System.Collections.Immutable;
 using System.Runtime.CompilerServices;
 using DynamoDBGenerator.SourceGenerator.Extensions;
 using DynamoDBGenerator.SourceGenerator.Types;
@@ -81,10 +80,8 @@ private static IEnumerable<string> YieldSelector((bool IsUnknown, DynamoDbDataMe
               .Concat($"foreach (var x in ({x.DDB.DataMember.Name} as {x.AttributeInterfaceName}).{AttributeExpressionNameTrackerInterfaceAccessedNames}())".CreateScope("yield return x;"));
             return $"if ({x.DDB.DataMember.NameAsPrivateField}.IsValueCreated)".CreateScope(scope);
         }
-        else
-        {
-            return $@"if ({x.DDB.DataMember.NameAsPrivateField}.IsValueCreated && new KeyValuePair<string, string>(""{x.DbRef}"", ""{x.DDB.AttributeName}"") is var {camelCase} && {SetFieldName}.Add({camelCase}))".CreateScope($"yield return {camelCase};");
-        }
+
+        return $@"if ({x.DDB.DataMember.NameAsPrivateField}.IsValueCreated && new KeyValuePair<string, string>(""{x.DbRef}"", ""{x.DDB.AttributeName}"") is var {camelCase} && {SetFieldName}.Add({camelCase}))".CreateScope($"yield return {camelCase};");
     }
 
     private static CodeFactory CreateStruct(ITypeSymbol typeSymbol, Func<ITypeSymbol, DynamoDbDataMember[]> fn, MarshallerOptions options)

src/DynamoDBGenerator.SourceGenerator/Generations/AttributeExpressionValue.cs

@@ -1,5 +1,3 @@
-using System.Collections.Immutable;
-using System.Reflection;
 using System.Runtime.CompilerServices;
 using DynamoDBGenerator.SourceGenerator.Extensions;
 using DynamoDBGenerator.SourceGenerator.Types;
@@ -49,11 +47,10 @@ MarshallerOptions options
 
         const string param = "entity";
 
-
         var yields = (typeSymbol switch
         {
-            var x when x.IsNullable() => $"if ({param} is null)".CreateScope($"yield return new ({self}.Value, {AttributeValueUtilityFactory.Null});", "yield break;"),
-            var x when x.IsReferenceType => $"if ({param} is null)".CreateScope($"throw {ExceptionHelper.NullExceptionMethod}(\"{structName}\");"),
+            _ when typeSymbol.IsNullable() => $"if ({param} is null)".CreateScope($"yield return new ({self}.Value, {AttributeValueUtilityFactory.Null});", "yield break;"),
+            { IsReferenceType: true } => $"if ({param} is null)".CreateScope($"throw {ExceptionHelper.NullExceptionMethod}(\"{structName}\");"),
             _ => Enumerable.Empty<string>()
         })
         .Concat(dataMembers