syntax_data: {"ast_node_type":"other","tokens":[{"end":5,"kind":"keyword","start":0,"text":"{"}]}
source_snippet:     {
context_before:     let (caller_location, determined_fn_def_id, is_virtual_call) = if let Some(instance) = instance
context_after:         let is_virtual_call = matches!(instance.def, ty::InstanceKind::Virtual(..));