syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"Alias(i,"}]}
source_snippet:             Alias(i, a) => f.debug_tuple("Alias").field(i).field(&a).finish(),
context_before:             }
context_after:             Param(p) => write!(f, "{p:?}"),