syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"HirPlaceBase::Upvar(upvar_id)"}]}
source_snippet:                     HirPlaceBase::Upvar(upvar_id) => upvar_id.var_path.hir_id,
context_before:                 let var_id = match captured_place.place.base {
context_after:                     _ => bug!("Expected an upvar"),