Function pio_diagnostic_related 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn pio_diagnostic_related(
    diagnostics: *const PioDiagnostics,
    index: usize,
    related_index: usize,
) -> PioStringView

Borrow one related diagnostic identity, or an empty view when out of range.

Safety

Pointers and handles must satisfy the crate-level safety requirements.