public TestDatabaseCreator(
     RelationalDatabaseCreatorDependencies dependencies,
     ISpannerRelationalConnection connection,
     IRawSqlCommandBuilder rawSqlCommandBuilder)
     : base(dependencies, connection, rawSqlCommandBuilder)
 {
 }
 /// <summary>
 /// This is internal functionality and not intended for public use.
 /// </summary>
 public SpannerDatabaseCreator(
     RelationalDatabaseCreatorDependencies dependencies,
     ISpannerRelationalConnection connection,
     IRawSqlCommandBuilder rawSqlCommandBuilder)
     : base(dependencies)
 {
     _connection           = connection;
     _rawSqlCommandBuilder = rawSqlCommandBuilder;
 }
 protected TestSpannerConnection(ISpannerRelationalConnection connection)
 => _realConnection = connection;