Flex Builder中非.as文档的代码完成

Is there any way to get ActionScript code completion to work fpr files that don't have the .as filetype? We're using .es for server-side ActionScript and would want Flex to treat them like regular AS-documents. File types can be bound to editors, which brings code highlighting to our .es docs, but code completion still does not work.Is there any way to get ActionScript code compl