     diagnosticEngine: DiagnosticsEngine,
     reporter: IncrementalCompilationState.Reporter?,
     emitDependencyDotFileAfterEveryImport: Bool,
-    verifyDependencyGraphAfterEveryImport: Bool)
-  {
+    verifyDependencyGraphAfterEveryImport: Bool
+  ) {
     self.verifyDependencyGraphAfterEveryImport = verifyDependencyGraphAfterEveryImport
     self.emitDependencyDotFileAfterEveryImport = emitDependencyDotFileAfterEveryImport
     self.reporter = reporter

      emitDependencyDotFileAfterEveryImport: parsedOptions.contains(emitOpt),
      verifyDependencyGraphAfterEveryImport: parsedOptions.contains(veriOpt))

    let inputsAndSwiftdeps = inputs.map {input in
      (input, outputFileMap?.existingOutput( inputFile: input.file,
                                             outputType: .swiftDeps)
      )
    }
    for isd in inputsAndSwiftdeps where isd.1 == nil {
      // The legacy driver fails silently here.

    fatalError("unimplmemented, writing dot file of dependency graph")
  }
}

