    # File lib/fog/joyent/requests/compute/get_machine_metadata.rb, line 6
            def get_machine_metadata(machine_id, options = {})
              query = {}
              if options[:credentials]
                if options[:credentials].is_a?(Boolean)
                  query[:credentials] = options[:credentials]
                else
                  raise ArgumentError, "options[:credentials] must be a Boolean or nil"
                end
              end

              request(
                :path => "/my/machines/#{machine_id}/metadata",
                :query => query
              )
            end