How I can change background color to red for row if row had timeToReply>15. I can't get timeToReply in rowDelegate. How I can do this ?

Qt Code: 
  1. TableView
  2.     {
  3.     model: someModel
  4.     TableViewColumn{title:"Time";role: "timeToReply";width: 170}
  5.         rowDelegate: Item {
  6.                     clip: true
  7.                     Text {
  8.                         anchors.verticalCenter: parent.verticalCenter
  9.                         color: {
  10.                             if(timeToReply>15)             //problem
  11.                             {
  12.                                 color="red"
  13.                             }
  14.                             else
  15.                             {
  16.                                 color="black"
  17.                             }
  18.                         }
  19.                         text: styleData.value
  20.                         elide: Text.ElideMiddle
  21.                     }
  22.                 }
  23.     }
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