@Override
public BitCodec<DeletionVariation> buildCodec(CramHeader header,
CompressionHeader compression,
SequenceBaseProvider referenceBaseProvider,
DefaultMutableTreeNode parent) throws CramCompressionException {
DeletionVariationCodec deletionCodec = new DeletionVariationCodec();
DefaultMutableTreeNode delNode = buildNode(deletionCodec,
"Deletion codec");
parent.add(delNode);
deletionCodec.dellengthPosCodec = register(