Function libgit2_sys::git_diff_tree_to_workdir_with_index

pub unsafe extern "C" fn git_diff_tree_to_workdir_with_index(
    diff: *mut *mut git_diff, 
    repo: *mut git_repository, 
    old_tree: *mut git_tree, 
    opts: *const git_diff_options
) -> c_int