def ng_bindings(binding, opt = {})
    opt[:root_selector] ||= ng_root_selector
    ng.get_nodes_2 :findBindingsIds, [binding, opt[:exact] == true], opt
  end
def ng_bindings(binding, opt = {})
    opt[:root_selector] ||= ng_root_selector
    ng.get_nodes_2 :findBindingsIds, [binding, opt[:exact] == true], opt
  end
All nodes matching binding

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