# File lib/aws/simple_workflow/workflow_type.rb, line 120
      def start_execution options = {}

        options[:domain] = domain.name
        start_execution_opts(options, self)
        response = client.start_workflow_execution(options)

        workflow_id = options[:workflow_id]
        run_id = response.data['runId']

        domain.workflow_executions[workflow_id, run_id]

      end