@java.lang.Override
    public boolean hasPosixDataSource() {
      return dataSourceCase_ == 14;
    }
<pre>
A POSIX Filesystem data source.
</pre>

<code>.google.storagetransfer.v1.PosixFilesystem posix_data_source = 14;</code>

@return Whether the posixDataSource field is set.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java