Remove ifPresent

[raderio]

UserProfile::age ifPresent {
    minimum(0)
    maximum(150)
}

Why it is neccesary to have ifPresent? Just apply validation rules ony if value is not null in any case.

[cies]

In that case minimum and maximum (amoung others) need to work both on a nullable context and on a non-nullable context.

I think the ifPresent also makes the intent of the code more clear to the reader.

[nlochschmidt]

I agree with @cies.