lib/plugins/aws/deploy/compile/events/apiGateway/lib/methods.js/generateIntegrationResponseHeaders
    const generateIntegrationResponseHeaders = (headers) => {
      const integrationResponseHeaders = {};

      Object.keys(headers).forEach(header => {
        integrationResponseHeaders[`method.response.header.${header}`] = headers[header];
      });

      return integrationResponseHeaders;
    };