# Functions
NewSpannerDriver returns a migration driver for the given Cloud Spanner instance.
NewSpannerVersionChecker returns a VersionProvider for the argument spanner.Client.
# Variables
SpannerMigrations implements a migration manager for the Spanner datastore.
# Structs
SpannerMigrationDriver can migrate a Cloud Spanner instance The adminClient is required for DDL changes.
Wrapper makes it possible to forward the spanner clients to the MigrationFunc's to execute.
# Interfaces
VersionProvider returns the migration version a specific spanner datastore is running at.