angular-ui/ng-grid — pull request #2381 by MattAtBT (2014-12-17 17:50:29+00:00)
Title: Issue #2149 - override expandableRowHeaderColDef.displayName

The column generated when enabling expandable rows uses the header "Expandable Buttons". Until a method to configure this header text is provided, an empty string is preferable to the current text.