Function create_draw_indexed_indirect_buffer 

pub fn create_draw_indexed_indirect_buffer(
    device: &Device,
    index_count: u32,
    instance_count: u32,
    label: &str,
) -> Buffer

Create an indirect indexed draw buffer (5 × u32: index_count, instance_count, first_index, base_vertex, first_instance).

The buffer has INDIRECT | STORAGE | COPY_DST usage.