Function libpulse_sys::volume::pa_cvolume_snprint_verbose

pub unsafe extern "C" fn pa_cvolume_snprint_verbose(
    s: *mut c_char, 
    l: usize, 
    c: *const pa_cvolume, 
    map: *const pa_channel_map, 
    print_dB: i32
) -> *mut c_char

This is supported on crate feature pa_v5 only.