apdli-keycloak-theme/themes/base/admin/resources/partials/realm-identity-provider-paypal-ext.html

<div class="form-group">
  <label class="col-md-2 control-label" for="sandbox">{{:: 'sandbox' | translate}}</label>
  <div class="col-md-6">
      <input ng-model="identityProvider.config.sandbox" id="sandbox" onoffswitchvalue on-text="{{:: 'onText' | translate}}" off-text="{{:: 'offText' | translate}}" />
  </div>
  <kc-tooltip>{{:: 'identity-provider.paypal-sandbox.tooltip' | translate}}</kc-tooltip>
</div>