Function FREGetContextNativeData 

pub unsafe extern "C" fn FREGetContextNativeData(
    ctx: *mut c_void,
    nativeData: *mut *mut c_void,
) -> FREResult

@returns FREResult::FRE_OK FREResult::FRE_WRONG_THREAD FREResult::FRE_INVALID_ARGUMENT If nativeData is null.