syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// body for the coroutine. This has the same type representation as the closure
context_before:     /// This field distinguishes these fields so that codegen can select the right
context_after:     /// kind: `i8`/`i16`/`i32`.