Function ALTREP_CLASS_unchecked 

pub(crate) unsafe extern "C-unwind" fn ALTREP_CLASS_unchecked(
    x: SEXP,
) -> SEXP

Unchecked FFI binding for ALTREP_CLASS. Generated from source location line 2305, column 19. Generated from source file miniextendr-api/src/ffi.rs.