An Is prefix implies it returns a boolean.
A Check prefix better suggests that it could return an error.
Change-Id: I6ffcb32099a944c656c07654c294a0980efb2d0e
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/220338
Reviewed-by: Damien Neil <dneil@google.com>
Make the fast-path and slow-path versions of IsInitialized report
exactly the same errors: An errors.RequiredNotSet containing the
full name of one of the unset required fields.
Bugfix: Fast-path IsInitialized on a nil message reports an error only
when the message directly contains required fields.
Bugfix: Include fast-path IsInitialized in legacy messageIfaceWrapper.
Fixesgolang/protobuf#887
Change-Id: Ia5e4b386f8c23f6f855d995f4a098b1338acbae3
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/185397
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
