code: public Where<T, ID> in(String columnName, QueryBuilder<?, ?> subQueryBuilder) throws SQLException {
  		return in(true, columnName, subQueryBuilder);
  	}
docs: Add a IN clause which makes sure the column is in one of the columns returned from a sub-query inside of
  parenthesis. The QueryBuilder must return 1 and only one column which can be set with the
  {@link QueryBuilder#selectColumns(String...)} method calls. That 1 argument must match the SQL type of the
  column-name passed to this method.
  
  <p>
  <b>NOTE:</b> The sub-query will be prepared at the same time that the outside query is.
  </p>