How to identify the code of the ES6 specification in <script></script> for reference

Hello,

I'm writing a plug-in for a special language. This language consists of a single file (including HTML, CSS, JS, like vue.js). When I use the ES6 standard export module:

How can I get the firstFun as reference at the cursor? 

I have a successful sample, but it is through modual.exports={},

I can get a JSObjectLiteralExpression object through the following code, and the JSObjectLiteralExpression can help me find firstFun through other function.

but when I do this, I can only get XmlText in the first case when run the first getChildren(),not  JSEmbeddedContent(in the second case) . The JSEmbeddedContent can help me get the JSObjectLiteralExpression finally,but the XmlText can't.

Any help? thanks,

ML