presto-main/src/main/java/io/prestosql/operator/aggregation/state/NullableBooleanStateSerializer.java/NullableBooleanStateSerializer/deserialize
class NullableBooleanStateSerializer:    @Override
    public void deserialize(Block block, int index, NullableBooleanState state)
    {
        state.setNull(false);
        state.setBoolean(BOOLEAN.getBoolean(block, index));
    }