return indexFilename;
// couldn't find preferred type, try the other supported types
// return index filename if found
if ( preferredType != BamIndex::STANDARD ) {
indexFilename = CreateIndexFilename(bamFilename, BamIndex::STANDARD);
return indexFilename;
// couldn't find preferred type, try the other supported types
// return index filename if found
if ( preferredType != BamIndex::STANDARD ) {
indexFilename = CreateIndexFilename(bamFilename, BamIndex::STANDARD);