syntax_data: {"ast_node_type":"other","tokens":[{"end":33,"kind":"keyword","start":0,"text":"{"}]}
source_snippet:                                 {
context_before:                                     self.typeck_results.type_dependent_def(fun.hir_id)
context_after:                                     Some((adt_def, adt_def.variant_index_with_ctor_id(ctor_id)))