syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // corresponding variant in linear time.
context_before:     // `AdtDef::discriminants`. We rely on this to match each discriminant in the targets to its
context_after:     fn next_discr(&mut self, value: u128) -> VariantIdx {