pub unsafe extern "C" fn nvs_get_i8(
    _handle: u32,
    _key: *const crate::binary::c_types::c_char,
    _out_value: *mut i8,
) -> crate::binary::c_types::c_int {
    todo!("nvs_get_i8")
}
**************************************************************************
Name: esp_nvs_get_i8

Description:
Read data of type int8_t from file system

Input Parameters:
handle    - NVS handle
key       - Data index
out_value - Read buffer pointer

Returned Value:
0 if success or -1 if fail

*************************************************************************
esp-wifi/src/wifi/os_adapter.rs