# File lib/hiera/backend.rb, line 345
      def interpolate_config(entry, scope, override)
        if @config_lookup_context.nil?
          @config_lookup_context = { :is_interpolate_config => true, :order_override => override, :recurse_guard => Hiera::RecursiveGuard.new }
          begin
            Hiera::Interpolate.interpolate(entry, scope, {}, @config_lookup_context)
          ensure
            @config_lookup_context = nil
          end
        else
          # Nested call (will happen when interpolate method 'hiera' is used)
          Hiera::Interpolate.interpolate(entry, scope, {}, @config_lookup_context.merge(:order_override => override))
        end
      end