title: AG Grid: Better way for validation row - valueSetter?
body: <p>Is there a better way to validate a row in <code>ag-grid</code> than with <code>valueSetter</code>?</p>
  
  <p>I can achieve the validation with that but I am not sure, if there is a better way. </p>
  
  <p><a href="https://www.ag-grid.com/javascript-grid-value-setters/#properties-for-setters-and-parsers" rel="nofollow noreferrer">https://www.ag-grid.com/javascript-grid-value-setters/#properties-for-setters-and-parsers</a></p>
  
  <p>I want to validate two fields in the row. DateFrom and DateUntil (they are not allow to be null and DateFrom must be lower than DateUntil).</p>