Function pio_dc_operators_branch_identity 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn pio_dc_operators_branch_identity(
    operators: *const PioDcOperators,
    index: usize,
) -> PioStringView

The stable identity of branch axis row index: the source uid when one exists, else branches:<row>. An index past the branch axis returns an empty view. Borrowed from the handle.

Safety

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