public int getConcurrency() throws SQLException {
        try {
             checkState();
        } catch(SQLException sqle) {
             super.getConcurrency();
        }
        return rs.getConcurrency();
    }
Returns the concurrency mode of this rowset's <code>ResultSet</code> object.
The concurrency used is determined by the
<code>Statement</code> object that created the result set.

@return the concurrency type, either <code>CONCUR_READ_ONLY</code>
or <code>CONCUR_UPDATABLE</code>
@throws SQLException if (1) a database access error occurs
           or (2) this rowset does not currently have a valid connection,
           prepared statement, and result set
src/main/java/org/replicadb/rowset/sun/rowset/JdbcRowSetImpl.java