{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"self.tcx.dcx().emit_err(errors::FieldAlreadyDeclared::BothNested"}]}
                self.tcx.dcx().emit_err(errors::FieldAlreadyDeclared::BothNested {
            (Nested(current @ NestedSpan { span, nested_field_span }), Some(Nested(prev))) => {
                    field_name,