code: @Override
      public CancelJobExecutionResult cancelJobExecution(CancelJobExecutionRequest request) {
          request = beforeClientExecution(request);
          return executeCancelJobExecution(request);
      }
docs: <p>
  Cancels the execution of a job for a given thing.
  </p>
  
  @param cancelJobExecutionRequest
  @return Result of the CancelJobExecution operation returned by the service.
  @throws InvalidRequestException
  The request is not valid.
  @throws InvalidStateTransitionException
  An attempt was made to change to an invalid state, for example by deleting a job or a job execution which
  is "IN_PROGRESS" without setting the <code>force</code> parameter.
  @throws ResourceNotFoundException
  The specified resource does not exist.
  @throws ThrottlingException
  The rate exceeds the limit.
  @throws ServiceUnavailableException
  The service is temporarily unavailable.
  @throws VersionConflictException
  An exception thrown when the version of an entity specified with the <code>expectedVersion</code>
  parameter does not match the latest version in the system.
  @sample AWSIot.CancelJobExecution