Function cognitive_services_speech_sdk_rs::ffi::synthesizer_start_speaking_text_async

pub unsafe extern "C" fn synthesizer_start_speaking_text_async(
    hsynth: SPXSYNTHHANDLE, 
    text: *const c_char, 
    textLength: u32, 
    phasync: *mut SPXASYNCHANDLE
) -> AZACHR