def ng_repeater_columns(repeater, binding, opt = {})
    opt[:root_selector] ||= ng_root_selector
    ng.get_nodes_2 :findRepeaterColumnIds, [repeater, binding], opt
  end
def ng_repeater_columns(repeater, binding, opt = {})
    opt[:root_selector] ||= ng_root_selector
    ng.get_nodes_2 :findRepeaterColumnIds, [repeater, binding], opt
  end
Node for column binding value in all rows

 @param opt
 - :root_selector
 - :wait
 @return [node, ...]