On the other hand, you could have "setters" using the same naming convention which do a clone-and-replace (and return the new object), that would not violate immutability (and would be easier than building objects from scratch every time from the outside) e.g.
Type setFoo(FooType foo) {
return new Type(
this.field0,
this.field1,
this.field2,
foo, // bam
this.field4);
}
many functional languages have that behavior when manipulating "records".
