# File lib/new_relic/agent/configuration/manager.rb, line 105
        def fetch(key)
          config_stack.each do |config|
            next unless config
            accessor = key.to_sym

            if config.has_key?(accessor)
              evaluated = evaluate_procs(config[accessor])

              begin
                return apply_transformations(accessor, evaluated)
              rescue
                next
              end
            end
          end

          nil
        end