def _parse_append_block(response):
append_block = AppendBlockProperties()<EOL>append_block.last_modified = parser.parse(response.headers.get('<STR_LIT>'))<EOL>append_block.etag = response.headers.get('<STR_LIT>')<EOL>append_block.append_offset = _int_to_str(response.headers.get('<STR_LIT>'))<EOL>append_block.committed_block_count = _int_to_str(response.headers.get('<STR_LIT>'))<EOL>return append_block<EOL>
Extracts append block response headers.