add_dependency

# File lib/finalize.rb, line 58
    def add_dependency(obj, dependant, method = :finalize, *opt)
      ObjectSpace.call_finalizer(obj)
      method = method.intern unless method.kind_of?(Integer)
      assoc = [dependant, method].concat(opt)
      if dep = @dependency[obj.object_id]
        dep.push assoc
      else
        @dependency[obj.object_id] = [assoc]
      end
    end