syntax_data: {"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"crate::mir::CoroutineSavedLocal,"}]}
source_snippet:     crate::mir::CoroutineSavedLocal,
context_before:     crate::mir::ConstValue,
context_after:     crate::mir::FakeReadCause,