syntax_data: {"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":".map(|(captured_place,"}]}
source_snippet:                     .map(|(captured_place, ty)| {
context_before:                     .zip_eq(args.upvar_tys())
context_after:                         let upvars = self.capture_upvar(expr, captured_place, ty);