private void removeSdk() {
    final Sdk currentSdk = getSelectedSdk();
    if (currentSdk != null) {
      final Sdk sdk = myProjectSdksModel.findSdk(currentSdk);
      final PySdkService sdkService = PySdkService.getInstance();
      sdkService.removeSdk(currentSdk);
      DumbService.allowStartingDumbModeInside(
          DumbModePermission.MAY_START_MODAL, () -> SdkConfigurationUtil.removeSdk(sdk));

      myProjectSdksModel.removeSdk(sdk);
      myProjectSdksModel.removeSdk(currentSdk);

      if (myModificators.containsKey(currentSdk)) {
        SdkModificator modificator = myModificators.get(currentSdk);
        myModifiedModificators.remove(modificator);
        myModificators.remove(currentSdk);
      }
      refreshSdkList();
      mySdkListChanged = true;
      // TODO select initially selected SDK
      if (mySdkList.getSelectedIndex() < 0) {
        mySdkList.setSelectedIndex(0);
      }
    }
  }
  private void addCreatedSdk(@Nullable final Sdk sdk, boolean newVirtualEnv) {
    if (sdk != null) {
      final PySdkService sdkService = PySdkService.getInstance();
      sdkService.restoreSdk(sdk);

      boolean isVirtualEnv = PythonSdkType.isVirtualEnv(sdk);
      if (isVirtualEnv && !newVirtualEnv) {
        AddVEnvOptionsDialog dialog = new AddVEnvOptionsDialog(myMainPanel);
        dialog.show();
        if (dialog.getExitCode() != DialogWrapper.OK_EXIT_CODE) {
          return;
        }
        SdkModificator modificator = myModificators.get(sdk);
        setSdkAssociated(modificator, !dialog.makeAvailableToAll());
        myModifiedModificators.add(modificator);
      }
      final Sdk oldSdk = myProjectSdksModel.findSdk(sdk);
      if (oldSdk == null) {
        myProjectSdksModel.addSdk(sdk);
      }
      refreshSdkList();
      mySdkList.setSelectedValue(myProjectSdksModel.findSdk(sdk.getName()), true);
      mySdkListChanged = true;
    }
  }