syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // deref coercions always start with a built-in deref.
context_before:                 // We don't need to do call adjust_span here since
context_after:                 let call_def_id = deref.method_call(self.tcx);