code: @Override
      public GetItemResult getItem(GetItemRequest request) {
          request = beforeClientExecution(request);
          return executeGetItem(request);
      }
docs: <p>
  The <code>GetItem</code> operation returns a set of attributes for the item with the given primary key. If there
  is no matching item, <code>GetItem</code> does not return any data and there will be no <code>Item</code> element
  in the response.
  </p>
  <p>
  <code>GetItem</code> provides an eventually consistent read by default. If your application requires a strongly
  consistent read, set <code>ConsistentRead</code> to <code>true</code>. Although a strongly consistent read might
  take more time than an eventually consistent read, it always returns the last updated value.
  </p>
  
  @param getItemRequest
  Represents the input of a <code>GetItem</code> operation.
  @return Result of the GetItem operation returned by the service.
  @throws ProvisionedThroughputExceededException
  Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests that receive this
  exception. Your request is eventually successful, unless your retry queue is too large to finish. Reduce
  the frequency of requests and use exponential backoff. For more information, go to <a href=
  "https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Programming.Errors.html#Programming.Errors.RetryAndBackoff"
  >Error Retries and Exponential Backoff</a> in the <i>Amazon DynamoDB Developer Guide</i>.
  @throws ResourceNotFoundException
  The operation tried to access a nonexistent table or index. The resource might not be specified
  correctly, or its status might not be <code>ACTIVE</code>.
  @throws RequestLimitExceededException
  Throughput exceeds the current throughput limit for your account. Please contact AWS Support at <a
  href="https://docs.aws.amazon.com/https:/aws.amazon.com/support">AWS Support</a> to request a limit
  increase.
  @throws InternalServerErrorException
  An error occurred on the server side.
  @sample AmazonDynamoDB.GetItem
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/dynamodb-2012-08-10/GetItem" target="_top">AWS API
  Documentation</a>