How to display multiple Columns display in dropdown list

Summary:

we have requirement to display multiple columns in dropdown list.

Content (please ensure you mask any confidential information):

I have created single selection and added the data using the wizard. Its display only one column successfully. Followed the below link to add the code but its throwing the error message as show in below screenshots:

https://blogs.oracle.com/vbcs/post/advanced-layouts-in-single-select-components

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):

<oj-select-single label-hint="Select (Single)" class="oj-flex-item oj-sm-12 oj-md-6"

    data="[[$variables.getGetbuListSDP]]" item-text="name">

     <template slot="collectionTemplate" data-oj-as="collection">