Function ecs_id_str_buf 

pub unsafe extern "C" fn ecs_id_str_buf(
    world: *const ecs_world_t,
    id: ecs_id_t,
    buf: *mut ecs_strbuf_t,
)

Write id string to buffer. Same as ecs_id_str but writes result to ecs_strbuf_t.

@param world The world. @param id The id to convert to a string. @param buf The buffer to write to.