in src/main/java/org/apache/commons/pool3/impl/LinkedBlockingDeque.java [1211:1227]
public boolean removeFirstOccurrence(final Object o) {
if (o == null) {
return false;
}
lock.lock();
try {
for (Node<E> p = first; p != null; p = p.next) {
if (o.equals(p.item)) {
unlink(p);
return true;
}
}
return false;
} finally {
lock.unlock();
}
}