Changes private types in public signatures to `Object`.
Should not change anything for code that accesses the members
directly, an unspeakable type is no different from `Object`,
unless you try to access members on it, and none of the types
have useful members, they're all of the form
`class _C {const _C();}`.
If any code tries to recognize annotation values from
the expression's *static* type, not the runtime type
of the constant value itself, such code would be affected
by this change. It's not expected that such code exists.
Updates documentation to have a single-line first paragraph
with a noun phrase describing the value ("Annotation for ...").
Updates the documentation for `visibleForTesting` to say that
you can use the annotated declaration from a `test/` file in
a different package. (You can, and it's even potentially useful.)
Some spot-wise wording changes in documentation.
Change-Id: I4e8cda477ea1c302bed7dd52bdff967e6719209b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/481121
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Lasse Nielsen <lrn@google.com>
Lasse R.H. Nielsen
a17099d161