public BooleanExpression ne(T right) {
        if (right == null) {
            throw new IllegalArgumentException("ne(null) is not allowed. Use isNotNull() instead");
        } else {
            return ne(ConstantImpl.create(right));
        }
    }
Create a {@code this <> right} expression

@param right rhs of the comparison
@return this != right
querydsl-core/src/main/java/com/querydsl/core/types/dsl/SimpleExpression.java