syntax_data: {"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // indexed closure and we stored in a map called closure_min_captures in TypeckResults
context_before:         // In analyze_closure() in upvar.rs we gathered a list of upvars used by an
context_after:         // with the closure's DefId. Here, we run through that vec of UpvarIds for