[FEATURE] Would you be able to add @Builder.Required to sure fields exist?

[jacobhboy]

As I know, there is no way lombok sure the fields exist when using @Builder. I think Suring the value exist is essential when using build written by another developer.

when defining

@Builder
@AllArgsConstructor(access = AccessLevel.PRIVATE)
public class A {
    @Builder.Required
    private Long a;

    private Long b;

when using

A.builder(1L)
    .b(2L)
    .build();

Additional context
I think @Builder.Excepted which remove the field from builder is good too.