code: def query_object(obj, attribute=nil)
        if hook_proxy_attribute?(obj, attribute) then
          query_hook_proxies(obj, attribute)
        elsif CaTissue::SpecimenRequirement === obj and not obj.identifier and obj.collection_protocol_event then
          query_requirement_using_cpe_inversion(obj, attribute)
        elsif CaTissue::ContainerPosition === obj and obj.identifier and attribute == :occupied_container then
          query_container_position_occupied_container(obj, attribute)
        else
          super
        end
      end
docs: @quirk caTissue Bug #147: SpecimenRequirement query ignores CPE.
     Work around this bug by an inverted query on the referenced CPE.
  
   @quirk caTissue Accessing an annotation hook DE proxy attribute uses a separate mechanism.
     Redirect the query to the annotation integration service in that case.
  
   @quirk caTissue Bug #169: ContainerPosition occupied container query returns parent
     container instead. Substitute a hard-coded HQL search for this case.
  
   @see CaRuby::Database#query_object