def ng_repeater_row(repeater, opt = {})
    opt[:root_selector] ||= ng_root_selector
    row = ng.row(opt)
    data = ng.get_nodes_2(:findRepeaterRowsIds, [repeater, row], opt)
    data.first
  end
def ng_repeater_row(repeater, opt = {})
    opt[:root_selector] ||= ng_root_selector
    row = ng.row(opt)
    data = ng.get_nodes_2(:findRepeaterRowsIds, [repeater, row], opt)
    data.first
  end
Node for nth repeater row

 @param opt
 - :row
 - :root_selector
 - :wait
 @return nth node