[#1033] steps on the way to issue 1033: You can add cleanup tasks which are deferred (during the javac run) until the end.

This already fixes the exotic-to-the-point-of-nonexistent bug where setter and wither compete to steal the `@param` off of the field’s javadoc. Next are to fix builder and setter/wither competing whilst bringing javadocs to `@Builder`.

Then for various other conflicts, we should defer removal of lombok imports and annotations until the end too.

doc/changelog.markdown

@@ -3,6 +3,7 @@ Lombok Changelog
 
 ### v1.18.5 "Edgy Guinea Pig"
 * BUGFIX: Since version 1.18.4, the delombok ant task didn't work and errored with a `NoClassDefFoundError`. [Issue #1932](https://github.com/rzwitserloot/lombok/issues/1932)
+* BUGFIX: Combining both `@Setter` and `@Wither` on the same field, when that field also has javadoc with a `--setter--` section or an `@param` tag, resulted in a race condition where the first handler to get to the field would take that part of the javadoc. This is a step along the way to fixing [Issue #1033](https://github.com/rzwitserloot/lombok/issues/1033)
 * FEATURE: The `@FieldNameConstants` feature now allows you to write the inner type by hand and add whatever you like to it; lombok will add the constants to this class. See the updated [FieldNameConstants feature](https://projectlombok.org/features/experimental/FieldNameConstants) page.
 * FEATURE: There is now a `lombok.config` key to configure `@ToString`'s call super behavior; it's just like `@EqualsAndHashCode` which has had it for a while now. [Issue #1918](https://github.com/rzwitserloot/lombok/issues/1918)
 * ENHANCEMENT: The toString generation of enums now contains the name of the enum constant. [Issue #1916](https://github.com/rzwitserloot/lombok/issues/1916)