# File lib/symetrie_com/acts_as_better_nested_set.rb, line 607
        def direct_children_by_id(*args)
          scope = args.last.is_a?(Hash) ? args.pop : {}
          ids = args.flatten.compact.uniq
          self.class.find_in_nested_set(:all, { 
            :conditions => ["#{scope_condition} AND #{prefixed_parent_col_name} = #{self.id} AND #{self.class.table_name}.#{self.class.primary_key} IN (?)", ids]
          }, scope)          
        end