code: @NonNull
    public static AlterTableStart alterTable(@Nullable String keyspace, @NonNull String tableName) {
      return alterTable(
          keyspace == null ? null : CqlIdentifier.fromCql(keyspace),
          CqlIdentifier.fromCql(tableName));
    }
docs: Shortcut for {@link #alterTable(CqlIdentifier,CqlIdentifier)
  alterTable(CqlIdentifier.fromCql(keyspaceName),CqlIdentifier.fromCql(tableName)}