/**
* Returns the platform unit associated with the provided read's read group.
*
* @param read read whose platform unit to retrieve
* @param header SAM header containing read groups
* @return the platform unit for the provided read's read group as a String, or null if the read
* has no read group.
*/
public static String getPlatformUnit(final GATKRead read, final SAMFileHeader header) {
final SAMReadGroupRecord readGroup = getSAMReadGroupRecord(read, header);
return readGroup != null ? readGroup.getPlatformUnit() : null;
}
