public Builder mergeFrom(
          com.google.storagetransfer.v1.proto.TransferTypes.PosixFilesystem other) {
        if (other
            == com.google.storagetransfer.v1.proto.TransferTypes.PosixFilesystem
                .getDefaultInstance()) return this;
        if (!other.getRootDirectory().isEmpty()) {
          rootDirectory_ = other.rootDirectory_;
          bitField0_ |= 0x00000001;
          onChanged();
        }
        this.mergeUnknownFields(other.getUnknownFields());
        onChanged();
        return this;
      }
<pre>
A POSIX filesystem resource.
</pre>

Protobuf type {@code google.storagetransfer.v1.PosixFilesystem}
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java