Function set_tech_pref
pub unsafe extern "C" fn set_tech_pref(
cfg: *mut CallConfigInfo,
tech_pref: TechPref,
valid: c_int,
) -> ErrorCodeAvailable on non-
ag35 only.pub unsafe extern "C" fn set_tech_pref(
cfg: *mut CallConfigInfo,
tech_pref: TechPref,
valid: c_int,
) -> ErrorCodeag35 only.