How to use

containsKey

method

in

org.apache.jena.ext.com.google.common.collect.BiMap

@Override
public boolean contains(Id patchId) {
  return idToVersion.containsKey(patchId) ;
}

private void validateVersionNotInUse(Version version) {
  if ( idToVersion.inverse().containsKey(version) )
    // Internal consistency error. FleStore was supposed to make it unique.
    throw new InternalErrorException("Version already in-use: "+version);
}