merge method

Implementation

GlobalConfigNullable merge(GlobalConfigNullable other) =>
    GlobalConfigNullable(
      isolationMode: other.isolationMode ?? isolationMode,
      enableReportSaver: other.enableReportSaver ?? enableReportSaver,
      goldenDiffGitRepo: other.goldenDiffGitRepo ?? goldenDiffGitRepo,
      runOnly: other.runOnly ?? runOnly,
      reportSavePath: other.reportSavePath ?? reportSavePath,
    );