Function libgit2_sys::git_diff_foreach

pub unsafe extern "C" fn git_diff_foreach(
    diff: *mut git_diff, 
    file_cb: git_diff_file_cb, 
    binary_cb: git_diff_binary_cb, 
    hunk_cb: git_diff_hunk_cb, 
    line_cb: git_diff_line_cb, 
    payload: *mut c_void
) -> c_int