syntax_data: {"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"InitLocation::Argument(local)"}]}
source_snippet:             InitLocation::Argument(local) => body.local_decls[local].source_info.span,
context_before:         match self.location {
context_after:             InitLocation::Statement(location) => body.source_info(location).span,