docs: public void createCore(String coreName, String configSet) throws SolrException {
          try {
              logger.debug("Creating core: host={}, core={}, configSet={}", host, coreName, configSet);
              CoreAdminRequest.Create request = new CoreAdminRequest.Create();
              request.setCoreName(coreName);
              request.setConfigSet(configSet);
              request.process(solrClient);
          } catch (Exception e) {
              throw new SolrException(SolrException.ErrorCode.CONFLICT, e);
          }
      }