Function try_get_unchecked 

#[doc(hidden)] pub(super) unsafe fn try_get_unchecked<I>(
    it: &mut I,
    idx: usize,
) -> I::Item
where
    I: Iterator,

Like Iterator::__iterator_get_unchecked, but doesn’t require the compiler to know that U: TrustedRandomAccess.

Safety

Same requirements calling get_unchecked directly.