codezhangy
diff --git a/‎src/main/java/graphql/language/FieldDefinition.java‎
Lines changed: 2 additions & 2 deletions b/‎src/main/java/graphql/language/FieldDefinition.java‎
Lines changed: 2 additions & 2 deletions
diff --git a/‎src/main/java/graphql/language/ObjectTypeDefinition.java‎
Lines changed: 3 additions & 3 deletions b/‎src/main/java/graphql/language/ObjectTypeDefinition.java‎
Lines changed: 3 additions & 3 deletions
diff --git a/‎src/main/java/graphql/parser/GraphqlAntlrToLanguage2.java‎
Lines changed: 10 additions & 0 deletions b/‎src/main/java/graphql/parser/GraphqlAntlrToLanguage2.java‎
Lines changed: 10 additions & 0 deletions
@@ -113,8 +113,8 @@ public static final class Builder implements NodeBuilder {
         private List<Comment> comments = Collections.emptyList();
         private Type type;
         private Description description;
-        private List<InputValueDefinition> inputValueDefinitions;
-        private List<Directive> directives;
+        private List<InputValueDefinition> inputValueDefinitions = new ArrayList<>();
+        private List<Directive> directives = new ArrayList<>();
 
         private Builder() {
         }
 
@@ -107,9 +107,9 @@ public static final class Builder implements NodeBuilder {
         private List<Comment> comments = Collections.emptyList();
         private String name;
         private Description description;
-        private List<Type> implementz;
-        private List<Directive> directives;
-        private List<FieldDefinition> fieldDefinitions;
+        private List<Type> implementz = new ArrayList<>();
+        private List<Directive> directives = new ArrayList<>();
+        private List<FieldDefinition> fieldDefinitions = new ArrayList<>();
 
         private Builder() {
         }
 
@@ -372,6 +372,16 @@ public ObjectTypeDefinition createObjectTypeDefinition(GraphqlParser.ObjectTypeD
         if (ctx.directives() != null) {
             def.directives(createDirectives(ctx.directives()));
         }
+        GraphqlParser.ImplementsInterfacesContext implementsInterfacesContext = ctx.implementsInterfaces();
+        List<Type> implementz = new ArrayList<>();
+        while (implementsInterfacesContext != null) {
+            implementsInterfacesContext.typeName().stream().map(this::createTypeName).forEach(implementz::add);
+            implementsInterfacesContext = implementsInterfacesContext.implementsInterfaces();
+        }
+        def.implementz(implementz);
+        if (ctx.fieldsDefinition() != null) {
+            def.fieldDefinitions(createFieldDefinitions(ctx.fieldsDefinition()));
+        }
         return def.build();
     }