docs: public void returnObjectUnsafe(String keyspace, CTConnection conn) {
          if (conn != null && conn.isOpen()) {
              try {
                  returnObject(keyspace, conn);
              } catch (Exception e) {
                  log.warn("Failed to return Cassandra connection to pool", e);
                  log.warn(
                          "Failure context: keyspace={}, pool={}, connection={}",
                          new Object[] { keyspace, this, conn });
              }
          }
      }