@BetaApi
  public static FieldValueList of(List<FieldValue> row, Field... schema) {
    return of(row, schema.length > 0 ? FieldList.of(schema) : null);
  }
@ BetaApi public static FieldValueList of ( List < FieldValue > row , Field ... schema ) { return of ( row , schema . length > 0 ? FieldList . of ( schema ) : null ) ; }
Creates an instance of {@code FieldValueList}, useful for testing.

<p>This method is unstable. See <a
href="https://github.com/googleapis/google-cloud-java/pull/2891">this discussion</a> for more
context.