// Make bitstream techMD metadata, add to file.
String techID = "techMd_for_bitstream_"+bitstreams[bits].getSequenceID();
AmdSec fAmdSec = new AmdSec();
fAmdSec.setID(techID);
TechMD techMd = new TechMD();
techMd.setID(gensym("tech"));
MdWrap mdWrap = new MdWrap();
setMdType(mdWrap, metsName);
XmlData xmlData = new XmlData();
mdWrap.getContent().add(xmlData);
techMd.getContent().add(mdWrap);
fAmdSec.getContent().add(techMd);
mets.getContent().add(fAmdSec);
crosswalkToMets(xwalk, bitstreams[bits], xmlData);
file.setADMID(techID);