code: public Observable<Boolean> existsAsync(String poolId, PoolExistsOptions poolExistsOptions) {
          return existsWithServiceResponseAsync(poolId, poolExistsOptions).map(new Func1<ServiceResponseWithHeaders<Boolean, PoolExistsHeaders>, Boolean>() {
              @Override
              public Boolean call(ServiceResponseWithHeaders<Boolean, PoolExistsHeaders> response) {
                  return response.body();
              }
          });
      }
docs: Gets basic properties of a pool.
  
  @param poolId The ID of the pool to get.
  @param poolExistsOptions Additional parameters for the operation
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the Boolean object