Java: Modifier.getLocation() does not work

[Marcono1234]

Description of the issue
It is not possible to use Modifier.getLocation(), apparently because Modifier is not a @sourceline / @locatable.

https://lgtm.com/query shows the following error:

@sourceline incompatible with Modifier::Modifier

It would really be useful to check where a modifier occurs, e.g. to be able to tell:

• If it occurs in front of an annotation for the same Modifiable
• If the modifiers are in the conventional order