syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // computed on MIR, while this very method is used to build MIR.
context_before:                     // The information required to determine whether a coroutine has drop is
context_after:                     // To avoid cycles, we consider that coroutines always require drop.