public static boolean readNull(ClickHouseInputStream input) throws IOException {
        return readBoolean(input);
    }
Read null marker from input stream. Same as
{@link #readBoolean(ClickHouseInputStream)}.

@param input non-null input stream
@return true if it's null; false otherwise
@throws IOException when failed to read value from input stream or reached
                    end of the stream
clickhouse-data/src/main/java/com/clickhouse/data/format/BinaryStreamUtils.java