syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"Param(p)"}]}
source_snippet:             Param(p) => write!(f, "{p:?}"),
context_before:             Alias(i, a) => f.debug_tuple("Alias").field(i).field(&a).finish(),
context_after:             Bound(d, b) => crate::debug_bound_var(f, *d, b),