code: def can_hold_child?(storable)
        st = storable.storable_type
        not full? and child_types.any? { |ct| Jinx::Resource.value_equal?(ct, st) }
      end
docs: Overrides {Container#can_hold_child?} to detect account for the potential instance-specific
   {StorageTypeHolder#child_types} override allowed by caTissue.
  
   @param [Storable] (see #add)
   @return [Boolean] whether this container is not full and can hold the given item's
     {CaTissue::StorageType}