Function roaring_uint32_iterator_skip_backward 

pub unsafe extern "C" fn roaring_uint32_iterator_skip_backward(
    it: *mut roaring_uint32_iterator_t,
    count: u32,
) -> u32

Skip the previous ${count} values from iterator (move backwards). Returns the number of values actually skipped backwards. The number can be smaller than ${count}, which means that iterator reached the beginning.

This function is equivalent to calling roaring_uint32_iterator_previous() ${count} times but is much more efficient.