syntax_data: {"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"PlaceBase::Upvar"}]}
source_snippet:             PlaceBase::Upvar { .. } => {
context_before:             // is same as that of the capture in the parent closure.
context_after:                 let enclosing_upvars_resolved = arg_place_builder.to_place(this);