[Java] ComplexWriterImpl.setValueCount() doesn't set the value count of its "root" container

[asfimport]

The following code:

    MapVector vector = new MapVector(name, allocator, null);
    ComplexWriterImpl mapWriter = new ComplexWriterImpl("colMap", vector);
    BaseWriter.MapWriter mapWr = mapWriter.rootAsMap();
    // write into the map vector
    …
    mapWriter.setValueCount(5);

is expected to set the value count of vector to 5, but it doesn't

Reporter: Abdel Hakim Deneche / @adeneche

_{Note: This issue was originally created as ARROW-329. Please see the migration documentation for further details.}

[asfimport]

Todd Farmer / @toddfarmer:
This issue was last updated over 90 days ago, which may be an indication it is no longer being actively worked. To better reflect the current state, the issue is being unassigned. Please feel free to re-take assignment of the issue if it is being actively worked, or if you plan to start that work soon.

[danepitkin]

Fixed in #36375

It contains tests for setValueCount functionality: https://github.com/apache/arrow/pull/36351/files#diff-d272bd6f29af178ded979919169629bff9dc6d558da6c876e8f5b8358da1fdbfR1615-R1618