code: public Iteration getIteration(UUID projectId, UUID iterationId) {
          return getIterationWithServiceResponseAsync(projectId, iterationId).toBlocking().single().body();
      }
docs: Get a specific iteration.
  
  @param projectId The id of the project the iteration belongs to
  @param iterationId The id of the iteration to get
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the Iteration object if successful.