syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // | | +--------+     +-------------+  |  +---------------+ |
context_before:         // | | | return | <-+ | drop(outer) | <-+ |  drop(middle) | |
context_after:         // | +------------|outer_scope cache|--+                    |