message: Mark field readonly
diff: @@ -123,7 +123,7 @@ export class CMakeTools implements vscode.Disposable, api.CMakeToolsAPI {
  /**
  * A strand to serialize operations with the CMake driver
  */
  - private _driverStrand = new Strand();
  + private readonly _driverStrand = new Strand();
  /**
  * The object in charge of talking to CMake. It starts empty (null) because
  