syntax_data: {"ast_node_type":"function","tokens":[{"end":25,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn ty(self) -> I::Ty;
context_before: pub trait ValueConst<I: Interner<ValueConst = Self>>: Copy + Debug + Hash + Eq {
context_after:     fn valtree(self) -> I::ValTree;