Project keys for next gen issue types

Hi there,

this is a followup discussion to this topic.

I would like to get the project key (in addition to id) while getting information about issue types for nextgen projects.

I do not want to use the api - rest/api/2/project?expand=issueTypes for couple of reasons - it is deprecated, and it is too much information to process, just to get a project key associated with a nextgen issue type.

I am using /rest/api/2/issuetype and would like to also get the project key for the issue type. Is there a way to fetch project key?