old_contents: from .base import MultiSelectField
  from swimlane.core.resources.usergroup import UserGroup
  
  
  class UserGroupField(MultiSelectField):
      """Manages getting/setting users from record User/Group fields"""
  
      field_type = 'Core.Models.Fields.UserGroupField, Core'
  
      supported_types = [UserGroup]
  
      def cast_to_python(self, value):
          """Convert JSON definition to UserGroup object"""
          # v2.x does not provide a distinction between users and groups at the field selection level, can only return
          # UserGroup instances instead of specific User or Group instances
          if value is not None:
              value = UserGroup(self.record._swimlane, value)
  
          return value
  
      def cast_to_swimlane(self, value):
          """Dump UserGroup back to JSON representation"""
          if value is not None:
              value = value.get_usergroup_selection()
  
          return value
  
new_contents: from .base import MultiSelectField
  from swimlane.core.resources.usergroup import UserGroup
  
  
  class UserGroupField(MultiSelectField):
      """Manages getting/setting users from record User/Group fields"""
  
      field_type = 'Core.Models.Fields.UserGroupField, Core'
  
      supported_types = [UserGroup]
  
      def set_swimlane(self, value):
          """Workaround for reports returning an empty usergroup field as a single element list with no id/name"""
          if value == [{"$type": "Core.Models.Utilities.UserGroupSelection, Core"}]:
              value = []
  
          return super(UserGroupField, self).set_swimlane(value)
  
      def cast_to_python(self, value):
          """Convert JSON definition to UserGroup object"""
          # v2.x does not provide a distinction between users and groups at the field selection level, can only return
          # UserGroup instances instead of specific User or Group instances
          if value is not None:
              value = UserGroup(self.record._swimlane, value)
  
          return value
  
      def cast_to_swimlane(self, value):
          """Dump UserGroup back to JSON representation"""
          if value is not None:
              value = value.get_usergroup_selection()
  
          return value
  
subject: Fix multiselect user/group field when retrieving results from a report