How to add logic in columnDefs of ui-grid?

Question

I am using ui-grid for one AngularJS project. While defining the columnDefs for that particular grid, I need to set header name dynamically, e.g. I've one value stored in session storage or in grid's parent $scope, based on that value I need different header names.

Refer to example below:

 {
        name: 'UHID',
        displayName: JSON.parse(sessionStorage.appConfig).isRegistrationLabelForMalayasianClient ? 'reg.mrNo' : 'reg.uhid',
        enableSorting: true,
        enableCellEdit: false,
        headerCellFilter: "translate",
        // pinnedLeft: true,
        width: 120,
        cellTooltip: function(row, col) {
          return row.entity.UHID
        }
      }

but this is throwing error as the grid definition is not injected.

Please help with your valuable solutions or ideas.