How do I show issueskey as a search result column for issues in epic?

[Tere Pile]

I have a pretty simple search for Epics, open - my search results are fine, but I want to see a column which includes the issue key for 'issues in epic' (and links).  The epic link shows keys properly, but i can't seem to find a value which will return the 'issues in epic' keys also.  

[Ollie Guan]

The field name is "Epic Link"

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[Tere Pile]

Epic link gives me 'links' not issues in epic, I could change all of the issues in to links but that's kind of a pain, seems like there has to be a better way