syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"match"}]}
source_snippet:     match ctx.hashing_controls() {
context_before: fn assert_default_hashing_controls(ctx: &impl HashStableContext, msg: &str) {
context_after:         // Note that we require that `hash_spans` be set according to the global