syntax_data: {"ast_node_type":"function","tokens":[{"end":39,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn is_identity(&self) -> bool {
context_before: impl<I: Interner> CanonicalVarValues<I> {
context_after:         self.var_values.iter().enumerate().all(|(bv, arg)| match arg.kind() {