To highlight the values in a dropdown of a reference selector

Hello everyone, Can I know if there is any way to highlight the values in a drop down of a reference selector? I mean we have few values in a dropdown, I wanted to highlight the specific values, for example drop down consists of A, B, C, D, E and I want to show A, B, C values in bold remaining all normal. Can I know how is this possible?? I want specific values to be shown in bold in a reference selector drop down. Thanks in advance  
1 answers

I think there are multiple ways to solve this, but one is using this widget: and using a listview to display the values. In the listview you can style the container or whatever based on attribute values. 

Might be some custom modelling to arrange the selection but it should work.