如何使用Unioffice库和golang更新Ppt模板

Question

I want to update a PowerPoint template using Go and Unioffice library.

For Example:

1. I have key and value in ppt as

   firstname:${firstname} 
   lastname:${lastname}
   

2. I have an XML file which contains below data:

   <firstname> Arjun </firstname>
   <lastname>  Rathore</lastname>
   

3. I want to dynamically update the ppt firstname with Arjun and lastname with Rathore.

I tried to do it using Go and Unioffice library, but I am not able to update the ppt with XML file data.

Please find the attached code screen shot: enter image description here