presto-thrift/src/main/java/io/prestosql/plugin/thrift/ThriftConnectorConfig.java/ThriftConnectorConfig/setMetadataRefreshThreads
class ThriftConnectorConfig:    @Config("presto-thrift.metadata-refresh-threads")
    public ThriftConnectorConfig setMetadataRefreshThreads(int metadataRefreshThreads)
    {
        this.metadataRefreshThreads = metadataRefreshThreads;
        return this;
    }