code: public void setProperty(String columnName, Object newValue) {
          try {
              getResultSet().updateObject(columnName, newValue);
              updated = true;
          }
          catch (SQLException e) {
              throw new MissingPropertyException(columnName, GroovyResultSetProxy.class, e);
          }
      }
docs: Updates the designated column with an <code>Object</code> value.
  
  @param columnName the SQL name of the column
  @param newValue   the updated value
  @throws MissingPropertyException if an SQLException happens while setting the new value
  @see groovy.lang.GroovyObject#setProperty(java.lang.String, java.lang.Object)
  @see ResultSet#updateObject(java.lang.String, java.lang.Object)