javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerBranchConfigIT.java [246:322]:
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  private void configureFileExtension(Project.NameKey project, String fileExtension)
      throws Exception {
    setCodeOwnersConfig(
        project, /* subsection= */ null, GeneralConfig.KEY_FILE_EXTENSION, fileExtension);
  }

  private void configureOverrideInfoUrl(Project.NameKey project, String overrideInfoUrl)
      throws Exception {
    setCodeOwnersConfig(
        project, /* subsection= */ null, GeneralConfig.KEY_OVERRIDE_INFO_URL, overrideInfoUrl);
  }

  private void configureMergeCommitStrategy(
      Project.NameKey project, MergeCommitStrategy mergeCommitStrategy) throws Exception {
    setCodeOwnersConfig(
        project,
        /* subsection= */ null,
        GeneralConfig.KEY_MERGE_COMMIT_STRATEGY,
        mergeCommitStrategy.name());
  }

  private void configureFallbackCodeOwners(
      Project.NameKey project, FallbackCodeOwners fallbackCodeOwners) throws Exception {
    setCodeOwnersConfig(
        project,
        /* subsection= */ null,
        GeneralConfig.KEY_FALLBACK_CODE_OWNERS,
        fallbackCodeOwners.name());
  }

  private void configureDisabledBranch(Project.NameKey project, String disabledBranch)
      throws Exception {
    setCodeOwnersConfig(
        project, /* subsection= */ null, StatusConfig.KEY_DISABLED_BRANCH, disabledBranch);
  }

  private void configureBackend(Project.NameKey project, String backendName) throws Exception {
    configureBackend(project, /* branch= */ null, backendName);
  }

  private void configureBackend(
      Project.NameKey project, @Nullable String branch, String backendName) throws Exception {
    setCodeOwnersConfig(project, branch, BackendConfig.KEY_BACKEND, backendName);
  }

  private void configureRequiredApproval(Project.NameKey project, String requiredApproval)
      throws Exception {
    setCodeOwnersConfig(
        project,
        /* subsection= */ null,
        RequiredApprovalConfig.KEY_REQUIRED_APPROVAL,
        requiredApproval);
  }

  private void configureOverrideApproval(Project.NameKey project, String overrideApproval)
      throws Exception {
    setCodeOwnersConfig(
        project,
        /* subsection= */ null,
        OverrideApprovalConfig.KEY_OVERRIDE_APPROVAL,
        overrideApproval);
  }

  private void configureImplicitApprovals(Project.NameKey project) throws Exception {
    setCodeOwnersConfig(
        project, /* subsection= */ null, GeneralConfig.KEY_ENABLE_IMPLICIT_APPROVALS, "true");
  }

  /** Returns the ID of a code owner backend that is not the given backend. */
  private String getOtherCodeOwnerBackend(CodeOwnerBackend codeOwnerBackend) {
    for (CodeOwnerBackendId codeOwnerBackendId : CodeOwnerBackendId.values()) {
      if (!codeOwnerBackendId.getCodeOwnerBackendClass().equals(codeOwnerBackend.getClass())) {
        return codeOwnerBackendId.getBackendId();
      }
    }
    throw new IllegalStateException(
        String.format("couldn't find other backend than %s", codeOwnerBackend.getClass()));
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javatests/com/google/gerrit/plugins/codeowners/acceptance/api/GetCodeOwnerProjectConfigIT.java [274:350]:
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  private void configureFileExtension(Project.NameKey project, String fileExtension)
      throws Exception {
    setCodeOwnersConfig(
        project, /* subsection= */ null, GeneralConfig.KEY_FILE_EXTENSION, fileExtension);
  }

  private void configureOverrideInfoUrl(Project.NameKey project, String overrideInfoUrl)
      throws Exception {
    setCodeOwnersConfig(
        project, /* subsection= */ null, GeneralConfig.KEY_OVERRIDE_INFO_URL, overrideInfoUrl);
  }

  private void configureMergeCommitStrategy(
      Project.NameKey project, MergeCommitStrategy mergeCommitStrategy) throws Exception {
    setCodeOwnersConfig(
        project,
        /* subsection= */ null,
        GeneralConfig.KEY_MERGE_COMMIT_STRATEGY,
        mergeCommitStrategy.name());
  }

  private void configureFallbackCodeOwners(
      Project.NameKey project, FallbackCodeOwners fallbackCodeOwners) throws Exception {
    setCodeOwnersConfig(
        project,
        /* subsection= */ null,
        GeneralConfig.KEY_FALLBACK_CODE_OWNERS,
        fallbackCodeOwners.name());
  }

  private void configureDisabledBranch(Project.NameKey project, String disabledBranch)
      throws Exception {
    setCodeOwnersConfig(
        project, /* subsection= */ null, StatusConfig.KEY_DISABLED_BRANCH, disabledBranch);
  }

  private void configureBackend(Project.NameKey project, String backendName) throws Exception {
    configureBackend(project, /* branch= */ null, backendName);
  }

  private void configureBackend(
      Project.NameKey project, @Nullable String branch, String backendName) throws Exception {
    setCodeOwnersConfig(project, branch, BackendConfig.KEY_BACKEND, backendName);
  }

  private void configureRequiredApproval(Project.NameKey project, String requiredApproval)
      throws Exception {
    setCodeOwnersConfig(
        project,
        /* subsection= */ null,
        RequiredApprovalConfig.KEY_REQUIRED_APPROVAL,
        requiredApproval);
  }

  private void configureOverrideApproval(Project.NameKey project, String overrideApproval)
      throws Exception {
    setCodeOwnersConfig(
        project,
        /* subsection= */ null,
        OverrideApprovalConfig.KEY_OVERRIDE_APPROVAL,
        overrideApproval);
  }

  private void configureImplicitApprovals(Project.NameKey project) throws Exception {
    setCodeOwnersConfig(
        project, /* subsection= */ null, GeneralConfig.KEY_ENABLE_IMPLICIT_APPROVALS, "true");
  }

  /** Returns the ID of a code owner backend that is not the given backend. */
  private String getOtherCodeOwnerBackend(CodeOwnerBackend codeOwnerBackend) {
    for (CodeOwnerBackendId codeOwnerBackendId : CodeOwnerBackendId.values()) {
      if (!codeOwnerBackendId.getCodeOwnerBackendClass().equals(codeOwnerBackend.getClass())) {
        return codeOwnerBackendId.getBackendId();
      }
    }
    throw new IllegalStateException(
        String.format("couldn't find other backend than %s", codeOwnerBackend.getClass()));
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