openClientFile(fileName, fileContent, scriptKind, projectRootPath) {
    this.projectService.openClientFileWithNormalizedPath(
      fileName,
      fileContent,
      scriptKind,
      /*hasMixedContent*/
      false,
      projectRootPath
    );
  }
@param fileName is the name of the file to be opened
@param fileContent is a version of the file content that is known to be more up to date than the one on disk