docs: public void matchList(String ElementName, String[] values, int oper)
      {
          // Delete the old search filter
          m_filter = null;
          // If not NOT_IN, assume IN
          // (Since ints are passed by value, it is OK to change it)
          if (oper != NOT_IN)
          {
              oper = IN;
              // Create a leaf node for this list and store it as the filter
          }
          m_filter = new SearchBaseLeaf(ElementName, oper, values);
      }