// @formatter:off should impact save actions too

This is probably a new feature request rather than a bug.

Currently, // @formatter:off and // @formatter:on are great for having VSCode not format part of your file. This behavior could also extend to save actions, not just formatting. For example, when using Args4J, you annotate fields with @Option and those fields are set for you based on command line arguments (through some kind of reflection black magic). If one of those fields is final, then Args4J throws an exception. Example of a field with the annotation:

@Option(name = "--write-tps", handler = LongOptionHandler.class, usage = "The target write tps when updating the table")
private Long writeTps = 1L;

When saving, VSCode will add final:

@Option(name = "--write-tps", handler = LongOptionHandler.class, usage = "The target write tps when updating the table")
private final Long writeTps = 1L;

but that is not desirable in this case.

Ideally we could use comments to turn off adding final, like this:

// @formatter:off
@Option(name = "--read-capacity", handler = LongOptionHandler.class, usage = "The target read capacity to utilize when scanning the table")
private Long readCapacity = 1L;

@Option(name = "--write-tps", handler = LongOptionHandler.class, usage = "The target write tps when updating the table")
private Long writeTps = 1L;

@Option(name = "--no-dry-run", handler = BooleanOptionHandler.class, usage = "If set to true, the backfill will be done to records needing it")
private Boolean noDryRun = false;
// @formatter:on

VSCode Java の保存アクションの経路から始めて、書式設定において // @formatter:off/on が現在どのように処理されているかを追跡してください。ここに示す Args4J フィールドを含め、保存アクションによって注釈付きの領域が変更されず、マーカーの外側の動作もそのまま維持されれば完了です。