syntax_data: {"ast_node_type":"import","tokens":[{"end":66,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// to represent the closure kind, because it has not yet been
context_before:     /// Note that during type checking, we use an inference variable
context_after:     /// inferred. Once upvar inference (in `rustc_hir_analysis/src/check/upvar.rs`)