Function ggml_quantize_chunk 

pub unsafe extern "C" fn ggml_quantize_chunk(
    type_: ggml_type,
    src: *const f32,
    dst: *mut c_void,
    start: i64,
    nrows: i64,
    n_per_row: i64,
    imatrix: *const f32,
    user_data: *const quantize_user_data,
) -> usize