Add optional feature to generate a builder class for each domain object class.
The builder class provides a fluent interface to build domain objects in a manner that can be easier to work with and read.

Example of builder class use:

Person sam = new PersonBuilder()
  .firstName("Sam")
  .lastName("Smith")
  .phone("1111111111")
  .email("sam@some.com")
  .build();

Example using static import:

import static sample.builder.PersonBuilder.person;
import static sample.builder.AddressBuilder.address;

Person sam = person().
  .firstName("Sam")
  .lastName("Smith")
  .phone("1111111111")
  .email("sam@some.com")
  .homeAddress(
    address().street("111 some way").zip("11111").build())
  .build();

Builders always provide a no-args constructor in addition to the minimal constructor. They support setting attributes, single and multi-references into the domain class.