Function read_ops_no_comp 

pub fn read_ops_no_comp<R: Read>(
    reader: &mut R,
    header: &mut SectionHeader,
    op_buffer: &mut Vec<Op>,
) -> Result<()>

Reads the operations from the reader at the current position. Cannot have secondary compression still applied.

The mutable reference to the section header is so that the function can update the number of add bytes in the event the format is interleaved. This way the header reflects reality regardless of if it was originally encoded in the header.