code: @Override
      public PutFunctionConcurrencyResult putFunctionConcurrency(PutFunctionConcurrencyRequest request) {
          request = beforeClientExecution(request);
          return executePutFunctionConcurrency(request);
      }
docs: <p>
  Sets the maximum number of simultaneous executions for a function, and reserves capacity for that concurrency
  level.
  </p>
  <p>
  Concurrency settings apply to the function as a whole, including all published versions and the unpublished
  version. Reserving concurrency both ensures that your function has capacity to process the specified number of
  events simultaneously, and prevents it from scaling beyond that level. Use <a>GetFunction</a> to see the current
  setting for a function.
  </p>
  <p>
  Use <a>GetAccountSettings</a> to see your regional concurrency limit. You can reserve concurrency for as many
  functions as you like, as long as you leave at least 100 simultaneous executions unreserved for functions that
  aren't configured with a per-function limit. For more information, see <a
  href="https://docs.aws.amazon.com/lambda/latest/dg/concurrent-executions.html">Managing Concurrency</a>.
  </p>
  
  @param putFunctionConcurrencyRequest
  @return Result of the PutFunctionConcurrency operation returned by the service.
  @throws ServiceException
  The AWS Lambda service encountered an internal error.
  @throws InvalidParameterValueException
  One of the parameters in the request is invalid. For example, if you provided an IAM role for AWS Lambda
  to assume in the <code>CreateFunction</code> or the <code>UpdateFunctionConfiguration</code> API, that
  AWS Lambda is unable to assume you will get this exception.
  @throws ResourceNotFoundException
  The resource (for example, a Lambda function or access policy statement) specified in the request does
  not exist.
  @throws TooManyRequestsException
  Request throughput limit exceeded.
  @sample AWSLambda.PutFunctionConcurrency
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/lambda-2015-03-31/PutFunctionConcurrency" target="_top">AWS
  API Documentation</a>