syntax_data: {"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"SourceInfo::outermost(param.pat.as_ref().map_or(self.fn_span,"}]}
source_snippet:                 SourceInfo::outermost(param.pat.as_ref().map_or(self.fn_span, |pat| pat.span));
context_before:             let source_info =
context_after:             let arg_local =