syntax_data: {"ast_node_type":"function","tokens":[{"end":50,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn from(ct: ty::UnevaluatedConst<I>) -> Self {
context_before: impl<I: Interner> From<ty::UnevaluatedConst<I>> for AliasTerm<I> {
context_after:         AliasTerm { args: ct.args, def_id: ct.def, _use_alias_term_new_instead: () }