syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"&self.var_values.as_slice()[value.as_usize()]"}]}
source_snippet:         &self.var_values.as_slice()[value.as_usize()]
context_before:     fn index(&self, value: ty::BoundVar) -> &I::GenericArg {
context_after:     }