presto-main/src/main/java/io/prestosql/execution/buffer/SerializedPageReference.java/SerializedPageReference/dereferencePage
class SerializedPageReference:    public void dereferencePage()
    {
        int remainingReferences = referenceCount.decrementAndGet();
        checkState(remainingReferences >= 0, "Page reference count is negative");

        if (remainingReferences == 0) {
            onDereference.run();
        }
    }