//! Collections of non-`Send`-able things are *not* `Send` use core::marker::PhantomData; use heapless::{ spsc::{Consumer, Producer, Queue}, }; type NotSend = PhantomData<*const ()>; fn is_send() where T: Send, { } fn main() { is_send::>(); is_send::>(); is_send::>(); is_send::>(); }