code: function getInvokedFunctionNameWithAliasOrVersion(context, awsContext) {
    awsContext = awsContext || context.awsContext;
    return (context.invokedLambda && context.invokedLambda.invoked) ||
      (awsContext && lambdas.getInvokedFunctionNameWithAliasOrVersion(awsContext));
  }
docs: Returns the Lambda's invoked function name with the invoked alias or version (if any).
  @param {StreamConsumerContext} context - the context to use
  @param {AWSContext|undefined} [awsContext] - the AWS Lambda context (defaults to context.awsContext if not defined)
  @return {string} the invoked function name with the invoked alias or version (if any)