code: func zeroVersions(cg *cb.ConfigGroup) {
  	cg.Version = 0
  
  	for _, value := range cg.Values {
  		value.Version = 0
  	}
  
  	for _, policy := range cg.Policies {
  		policy.Version = 0
  	}
  
  	for _, group := range cg.Groups {
  		zeroVersions(group)
  	}
  }
docs: // zeroVersions recursively iterates over a config tree, setting all versions to zero