# File lib/new_relic/agent/configuration/manager.rb, line 352
        def delete_all_configs_for_testing
          @high_security_source = nil
          @environment_source   = nil
          @server_source        = nil
          @manual_source        = nil
          @yaml_source          = nil
          @default_source       = nil
          @configs_for_testing  = []
        end