presto-rcfile/src/main/java/io/prestosql/rcfile/binary/BooleanEncoding.java/BooleanEncoding/decodeValueInto
class BooleanEncoding:    @Override
    public void decodeValueInto(BlockBuilder builder, Slice slice, int offset, int length)
    {
        type.writeBoolean(builder, slice.getByte(offset) != 0);
    }