syntax_data: {"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"destination_ty.is_unit()"}]}
source_snippet:                 destination_ty.is_unit() || this.block_context.currently_ignores_tail_results();
context_before:             let tail_result_is_ignored =
context_after:             this.block_context.push(BlockFrame::TailExpr {