syntax_data: {"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":".struct_span_err(self.def_span(item_id),"}]}
source_snippet:                     .struct_span_err(self.def_span(item_id), "multiple drop impls found")
context_before:                 self.dcx()
context_after:                     .with_span_note(self.def_span(old_item_id), "other impl here")