syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"assert!(*niche_start"}]}
source_snippet:                 assert!(*niche_start <= niche_size.unsigned_int_max());
context_before:                 let niche_size = tag.size(cx);
context_after:                 for (idx, variant) in variants.iter_enumerated() {