{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"//!"}]}
//!             where we discard any `specialize(c, p_i)` that returns nothing.
//!         - We recursively compute `usefulness(specialize(c, tp_1) ... specialize(c, tp_n), specialize(c, tq))`,
//!         - For each witness-tuple `w` found, we apply `unspecialize(c, w)` to it.