Night watch change value of textContent or innerHTML

I have the following markup and I need to be able to change the values of the textContent for these items:

<div class=".react-grid-HeaderCell-sortable">Jamie</div>
<div class=".react-grid-HeaderCell-sortable">Hutber</div>
<div class=".react-grid-HeaderCell-sortable">Stackoverflow</div>

I know how to change values for input fields, but currently don't know how to do text, maybe with a custom command?

For inputs

  .setValue('.someSelector', 'anewString')