How to use

firstKey

method

in

it.unimi.dsi.fastutil.ints.Int2ObjectSortedMap

/**
 * {@inheritDoc}
 * 
 * @deprecated Please use the corresponding type-specific method instead.
 */
@Deprecated
@Override
public Integer firstKey() {
  return sortedMap.firstKey();
}
/**

/**
 * {@inheritDoc}
 * 
 * @deprecated Please use the corresponding type-specific method instead.
 */
@Deprecated
@Override
public Integer firstKey() {
  synchronized (sync) {
    return sortedMap.firstKey();
  }
}
/**