allow searching by group

[ganapathyHf]

Currently, ember power select allows searching options. So given a group of options

 groups = [{
   groupName: 'IT',
   options: [...options related to IT]
 }, {
 groupName: 'HR &Admin',
 options: [...options related to HR]
 }]

searching an option will show both the group and the option.

Similarly can we allow searching the options by its group? Eg: I want to enter HR & Admin and all options related to it are shown.
I checked the codebase and other issues in the repo and found that we can achieve this by having a custom search function or having a search field that is a combination of option name and group name but can we have this feature built-in as searching by group seems to be a common/valid use case?