KtOperationReferenceExpression(195,197): '+='
  isImplicitReferenceToCompanion: false
  contextSensitiveResolutionStatus: NotAvailable
  lookupLocally: false
  KaSymbolResolutionSuccess:
    symbols = [
      test/WithOperator.plus(<dispatch receiver>: test.WithOperator, f: test.Foo): test.WithOperator
    ]
