Add return_bytearray and source_size kwargs to open
@@ -581,7 +581,8 @@ def open(filename, mode="rb",
content_checksum=False,
block_checksum=False,
auto_flush=False,
- return_bytearray=False):
+ return_bytearray=False,
+ source_size=0):
"""Open an LZ4Frame-compressed file in binary or text mode.
``filename`` can be either an actual file name (given as a str, bytes, or
