public static <T extends Number> WithinGroup<T> percentileCont(Expression<T> arg) {
        return new WithinGroup<T>(arg.getType(), SQLOps.PERCENTILECONT, arg);
    }
Calculates a percentile based on a continuous distribution of the column value

@param arg argument
@return percentile_cont(arg)
querydsl-sql/src/main/java/com/querydsl/sql/SQLExpressions.java