public boolean getBoolean(String columnName) throws SQLException {
      return getBoolean(getColIdxByName(columnName));
   }
Retrieves the value stored in the designated column
of the current row as a <code>boolean</code> value.

@param columnName a <code>String</code> object giving the SQL name of
       a column in this <code>StreamingRowSetImpl</code> object
@return the column value as a <code>boolean</code> in the Java programming
       language; if the value is SQL <code>NULL</code>,
       the result is <code>false</code>
@throws SQLException if (1) the given column name is not the name of
           a column in this rowset, (2) the cursor is not on one of
           this rowset's rows or its insert row, or (3) the designated
           column does not store an SQL <code>BOOLEAN</code> value
@see #getBoolean(int)
src/main/java/org/replicadb/rowset/StreamingRowSetImpl.java