code: @Override
      public UpdatePublicKeyResult updatePublicKey(UpdatePublicKeyRequest request) {
          request = beforeClientExecution(request);
          return executeUpdatePublicKey(request);
      }
docs: <p>
  Update public key information. Note that the only value you can change is the comment.
  </p>
  
  @param updatePublicKeyRequest
  @return Result of the UpdatePublicKey operation returned by the service.
  @throws AccessDeniedException
  Access denied.
  @throws CannotChangeImmutablePublicKeyFieldsException
  You can't change the value of a public key.
  @throws InvalidArgumentException
  The argument is invalid.
  @throws InvalidIfMatchVersionException
  The <code>If-Match</code> version is missing or not valid for the distribution.
  @throws IllegalUpdateException
  Origin and <code>CallerReference</code> cannot be updated.
  @throws NoSuchPublicKeyException
  The specified public key doesn't exist.
  @throws PreconditionFailedException
  The precondition given in one or more of the request-header fields evaluated to <code>false</code>.
  @sample AmazonCloudFront.UpdatePublicKey
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/cloudfront-2018-11-05/UpdatePublicKey" target="_top">AWS API
  Documentation</a>