code: private static int removeKamNode(KamNode collapsing,
              PreparedStatement knps, PreparedStatement knpps)
              throws SQLException {
          int collapsingId = collapsing.getId();
  
          int updates = 0;
          knpps.setInt(1, collapsingId);
          updates += knpps.executeUpdate();
          knps.setInt(1, collapsingId);
          updates += knps.executeUpdate();
          return updates;
      }
docs: Removes {@code collapsing} node.
  
  @param collapsing {@link KamNode} being collapsed
  @param knps {@link PreparedStatement} for updating kam_node
  @param knpps {@link PreparedStatement} for updating kam_node_parameter
  @return {@code int} update count
  @throws SQLException when a SQL error occurred with delete