14734d5767
Add a subclass to override common methods with VM specific implementations. DDC implementations will be added in future changes. Then these implementations will diverge more to support the VM rejecting edits at "runtime" vs DDC at compile time. Change-Id: I314b78e10d1f4d82da8af71e3fec3b3ef9f83aaf Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/393181 Reviewed-by: Mark Zhou <markzipan@google.com> Commit-Queue: Nicholas Shahan <nshahan@google.com>