syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"ty::InstanceKind::ConstructCoroutineInClosureShim"}]}
source_snippet:         ty::InstanceKind::ConstructCoroutineInClosureShim { receiver_by_ref: false, .. } => {
context_before:         }
context_after:             Some("by_ref")