# File lib/symetrie_com/acts_as_better_nested_set.rb, line 318
          def renumber_all
            scopes = []
            # only call it once for each scope_condition (if the scope conditions are messed up, this will obviously cause problems)
            roots.each do |r|
              r.renumber_full_tree unless scopes.include?(r.scope_condition)
              scopes << r.scope_condition
            end
          end