+/*
+ * Type of callback function for beginning to read a stream.
+ *
+ * @lte:
+ * Stream that is about to be read.
+ *
+ * @ctx:
+ * User-provided context.
+ *
+ * Must return 0 on success, a positive error code on failure, or the special
+ * value BEGIN_STREAM_STATUS_SKIP_STREAM to indicate that the stream should not
+ * be read, and read_stream_list() should continue on to the next stream
+ * (without calling @consume_chunk or @end_stream).
+ */