public static FileRecords open(File file) throws IOException {
        return open(file, true);
    }
Get an iterator over the record batches in the file, starting at a specific position. This is similar to
{@link #batches()} except that callers specify a particular position to start reading the batches from. This
method must be used with caution: the start position passed in must be a known start of a batch.
@param start The position to start record iteration from; must be a known position for start of a batch
@return An iterator over batches starting from {@code start}
clients/src/main/java/org/apache/kafka/common/record/FileRecords.java