old_contents: """
  Definition of the plugin.
  """
  from django.utils.translation import ugettext_lazy as _
  from fluent_contents.extensions import ContentPlugin, plugin_pool
  
  from . import models
  
  
  @plugin_pool.register
  class FormPlugin(ContentPlugin):
      model = models.FormItem
      category = _('Forms')
      render_template = 'icekit/plugins/reusable_form/default.html'
  
new_contents: """
  Definition of the plugin.
  """
  from django.utils.translation import ugettext_lazy as _
  from fluent_contents.extensions import ContentPlugin, plugin_pool
  
  from . import models
  
  
  @plugin_pool.register
  class FormPlugin(ContentPlugin):
      model = models.FormItem
      category = _('Forms')
      render_template = 'icekit/plugins/reusable_form/default.html'
      raw_id_fields = ['form', ]
  
subject: Add raw id fields.