anchor.diff:      <div data-hook="admin_shipping_method_form_internal_name_field" class="col-md-4">
         <%= f.field_container :admin_name, :class => ['form-group'] do %>
           <%= f.label :admin_name, Spree.t(:internal_name) %>
  -        <%= f.text_field :admin_name, :class => 'form-control', :label => false  %>
  +        <%= f.text_field :admin_name, :class => 'form-control', :label => false %>
           <%= error_message_on :shipping_method, :admin_name %>
         <% end %>
       </div>
  
positive.code:     <div data-hook="admin_shipping_method_form_display_field" class="col-md-6">
        <%= f.field_container :display_on, :class => ['form-group'] do %>
          <%= f.label :display_on, Spree.t(:display) %>
          <%= select(:shipping_method, :display_on, Spree::ShippingMethod::DISPLAY.collect { |display| [Spree.t(display), display == :both ? nil : display.to_s] }, {}, {:class => 'select2'}) %>
          <%= error_message_on :shipping_method, :display_on %>
        <% end %>
      </div>
  
negative.code:         <%= f.field_container :zones, :class => ['form-group'] do %>
            <% shipping_method_zones = @shipping_method.zones.to_a %>
            <% Spree::Zone.all.each do |zone| %>
              <div class="checkbox">
                <%= label_tag do %>
                  <%= check_box_tag('shipping_method[zones][]', zone.id, shipping_method_zones.include?(zone)) %>
                  <%= zone.name %>
                <% end %>
              </div>
            <% end %>
            <%= error_message_on :shipping_method, :zone_id %>
          <% end %>
        </div>
      </div>
    </div>
  