Function t_raw_get_region 

pub unsafe extern "C-unwind" fn t_raw_get_region<T: AltRaw>(
    x: SEXP,
    i: R_xlen_t,
    n: R_xlen_t,
    out: *mut Rbyte,
) -> R_xlen_t

Trampoline for raw Get_region method.

Safety

x must be a valid ALTREP RAWSXP and out a valid buffer of at least n elements.