def contact_of
      @contact_of ||= Person.distinct
                            .joins(activity_object: { circles: :ties })
                            .merge(Tie.with_contact_id(contact_id: guid))
    end
def contact_of
      @contact_of ||= Person.distinct
                            .joins(activity_object: { circles: :ties })
                            .merge(Tie.with_contact_id(contact_id: guid))
    end
A collection of {Socializer::Person people} this person is a contact of

 @return [ActiveRecord::Relation]