q42-cms-components/shared/form/validator-mixin.js

export const ValidatorMixin = {
  computed: {
    validatorEventBus () {
      let target = this
      while (target && !target.eventBus) {
        target = target.$parent
      }
      if (!target) {
        console.warn('Should have eventBus on an ancestor, make sure your <validator>/<submit> is inside a validator-group-base');
        return null;
      }
      return target.eventBus
    }
  }
}