let retryLimit = process . env . TWILIO_SERVERLESS_API_RETRY_LIMIT ; if ( typeof retryLimit === 'undefined' ) { retryLimit = '10' ; } let concurrency = process . env . TWILIO_SERVERLESS_API_CONCURRENCY ; if ( typeof concurrency === 'undefined' ) { concurrency = '50' ; } export const RETRY_LIMIT = parseInt ( retryLimit , 10 ) ; export const CONCURRENCY = parseInt ( concurrency , 10 ) ;