fixes #69, avoid module name inside module scope

test/codegen/expect/_foreign_helper/_foreign_helper.js

 var _foreign_helper;
-(function(_foreign_helper) {
+(function(exports) {
   'use strict';
   // Function JS: (String, String, [dynamic, dynamic, dynamic, dynamic, dynamic, dynamic, dynamic, dynamic, dynamic, dynamic, dynamic, dynamic]) → dynamic
   function JS(typeDescription, codeTemplate, arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11) {
     if (arg0 === void 0)
       arg0 = null;
     if (arg1 === void 0)
       arg1 = null;
     if (arg2 === void 0)
       arg2 = null;
     if (arg3 === void 0)
@@ skipping 102 matching lines @@
   class JS_CONST extends dart.Object {
     JS_CONST(code) {
       this.code = code;
     }
   }
   // Function JS_STRING_CONCAT: (String, String) → String
   function JS_STRING_CONCAT(a, b) {
     return a + b;
   }
   // Exports:
-  _foreign_helper.JS = JS;
-  _foreign_helper.JS_CURRENT_ISOLATE_CONTEXT = JS_CURRENT_ISOLATE_CONTEXT;
-  _foreign_helper.IsolateContext = IsolateContext;
-  _foreign_helper.JS_CALL_IN_ISOLATE = JS_CALL_IN_ISOLATE;
-  _foreign_helper.DART_CLOSURE_TO_JS = DART_CLOSURE_TO_JS;
-  _foreign_helper.RAW_DART_FUNCTION_REF = RAW_DART_FUNCTION_REF;
-  _foreign_helper.JS_SET_CURRENT_ISOLATE = JS_SET_CURRENT_ISOLATE;
-  _foreign_helper.JS_CREATE_ISOLATE = JS_CREATE_ISOLATE;
-  _foreign_helper.JS_DART_OBJECT_CONSTRUCTOR = JS_DART_OBJECT_CONSTRUCTOR;
-  _foreign_helper.JS_INTERCEPTOR_CONSTANT = JS_INTERCEPTOR_CONSTANT;
-  _foreign_helper.JS_OPERATOR_IS_PREFIX = JS_OPERATOR_IS_PREFIX;
-  _foreign_helper.JS_OPERATOR_AS_PREFIX = JS_OPERATOR_AS_PREFIX;
-  _foreign_helper.JS_OBJECT_CLASS_NAME = JS_OBJECT_CLASS_NAME;
-  _foreign_helper.JS_NULL_CLASS_NAME = JS_NULL_CLASS_NAME;
-  _foreign_helper.JS_FUNCTION_CLASS_NAME = JS_FUNCTION_CLASS_NAME;
-  _foreign_helper.JS_IS_INDEXABLE_FIELD_NAME = JS_IS_INDEXABLE_FIELD_NAME;
-  _foreign_helper.JS_CURRENT_ISOLATE = JS_CURRENT_ISOLATE;
-  _foreign_helper.JS_SIGNATURE_NAME = JS_SIGNATURE_NAME;
-  _foreign_helper.JS_TYPEDEF_TAG = JS_TYPEDEF_TAG;
-  _foreign_helper.JS_FUNCTION_TYPE_TAG = JS_FUNCTION_TYPE_TAG;
-  _foreign_helper.JS_FUNCTION_TYPE_VOID_RETURN_TAG = JS_FUNCTION_TYPE_VOID_RETURN_TAG;
-  _foreign_helper.JS_FUNCTION_TYPE_RETURN_TYPE_TAG = JS_FUNCTION_TYPE_RETURN_TYPE_TAG;
-  _foreign_helper.JS_FUNCTION_TYPE_REQUIRED_PARAMETERS_TAG = JS_FUNCTION_TYPE_REQUIRED_PARAMETERS_TAG;
-  _foreign_helper.JS_FUNCTION_TYPE_OPTIONAL_PARAMETERS_TAG = JS_FUNCTION_TYPE_OPTIONAL_PARAMETERS_TAG;
-  _foreign_helper.JS_FUNCTION_TYPE_NAMED_PARAMETERS_TAG = JS_FUNCTION_TYPE_NAMED_PARAMETERS_TAG;
-  _foreign_helper.JS_GET_NAME = JS_GET_NAME;
-  _foreign_helper.JS_EMBEDDED_GLOBAL = JS_EMBEDDED_GLOBAL;
-  _foreign_helper.JS_GET_FLAG = JS_GET_FLAG;
-  _foreign_helper.JS_EFFECT = JS_EFFECT;
-  _foreign_helper.JS_CONST = JS_CONST;
-  _foreign_helper.JS_STRING_CONCAT = JS_STRING_CONCAT;
+  exports.JS = JS;
+  exports.JS_CURRENT_ISOLATE_CONTEXT = JS_CURRENT_ISOLATE_CONTEXT;
+  exports.IsolateContext = IsolateContext;
+  exports.JS_CALL_IN_ISOLATE = JS_CALL_IN_ISOLATE;
+  exports.DART_CLOSURE_TO_JS = DART_CLOSURE_TO_JS;
+  exports.RAW_DART_FUNCTION_REF = RAW_DART_FUNCTION_REF;
+  exports.JS_SET_CURRENT_ISOLATE = JS_SET_CURRENT_ISOLATE;
+  exports.JS_CREATE_ISOLATE = JS_CREATE_ISOLATE;
+  exports.JS_DART_OBJECT_CONSTRUCTOR = JS_DART_OBJECT_CONSTRUCTOR;
+  exports.JS_INTERCEPTOR_CONSTANT = JS_INTERCEPTOR_CONSTANT;
+  exports.JS_OPERATOR_IS_PREFIX = JS_OPERATOR_IS_PREFIX;
+  exports.JS_OPERATOR_AS_PREFIX = JS_OPERATOR_AS_PREFIX;
+  exports.JS_OBJECT_CLASS_NAME = JS_OBJECT_CLASS_NAME;
+  exports.JS_NULL_CLASS_NAME = JS_NULL_CLASS_NAME;
+  exports.JS_FUNCTION_CLASS_NAME = JS_FUNCTION_CLASS_NAME;
+  exports.JS_IS_INDEXABLE_FIELD_NAME = JS_IS_INDEXABLE_FIELD_NAME;
+  exports.JS_CURRENT_ISOLATE = JS_CURRENT_ISOLATE;
+  exports.JS_SIGNATURE_NAME = JS_SIGNATURE_NAME;
+  exports.JS_TYPEDEF_TAG = JS_TYPEDEF_TAG;
+  exports.JS_FUNCTION_TYPE_TAG = JS_FUNCTION_TYPE_TAG;
+  exports.JS_FUNCTION_TYPE_VOID_RETURN_TAG = JS_FUNCTION_TYPE_VOID_RETURN_TAG;
+  exports.JS_FUNCTION_TYPE_RETURN_TYPE_TAG = JS_FUNCTION_TYPE_RETURN_TYPE_TAG;
+  exports.JS_FUNCTION_TYPE_REQUIRED_PARAMETERS_TAG = JS_FUNCTION_TYPE_REQUIRED_PARAMETERS_TAG;
+  exports.JS_FUNCTION_TYPE_OPTIONAL_PARAMETERS_TAG = JS_FUNCTION_TYPE_OPTIONAL_PARAMETERS_TAG;
+  exports.JS_FUNCTION_TYPE_NAMED_PARAMETERS_TAG = JS_FUNCTION_TYPE_NAMED_PARAMETERS_TAG;
+  exports.JS_GET_NAME = JS_GET_NAME;
+  exports.JS_EMBEDDED_GLOBAL = JS_EMBEDDED_GLOBAL;
+  exports.JS_GET_FLAG = JS_GET_FLAG;
+  exports.JS_EFFECT = JS_EFFECT;
+  exports.JS_CONST = JS_CONST;
+  exports.JS_STRING_CONCAT = JS_STRING_CONCAT;
 })(_foreign_helper || (_foreign_helper = {}));