syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"Some(UnusedUnsafeEnclosing::Block"}]}
source_snippet:                         Some(UnusedUnsafeEnclosing::Block {
context_before:                         block.span,
context_after:                             span: self.tcx.sess.source_map().guess_head_span(span),