syntax_data: {"ast_node_type":"function","tokens":[{"end":95,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn diverge_dropline_target(&mut self, target_scope: region::Scope, span: Span) -> DropIdx {
context_before:     /// Similar to diverge_cleanup_target, but for dropline (coroutine drop path)
context_after:         debug_assert!(