public static <T> SimpleOperation<T> operation(Class<? extends T> type, Operator operator,
            Expression<?>... args) {
        return simpleOperation(type, operator, args);

    }
Create a new Operation expression

@param type type of expression
@param operator operator
@param args operation arguments
@return operation expression
querydsl-core/src/main/java/com/querydsl/core/types/dsl/Expressions.java