code: func (p *dnsimpleProvider) ApplyChanges(changes *plan.Changes) error {
  	combinedChanges := make([]*dnsimpleChange, 0, len(changes.Create)+len(changes.UpdateNew)+len(changes.Delete))
  
  	combinedChanges = append(combinedChanges, newDnsimpleChanges(dnsimpleCreate, changes.Create)...)
  	combinedChanges = append(combinedChanges, newDnsimpleChanges(dnsimpleUpdate, changes.UpdateNew)...)
  	combinedChanges = append(combinedChanges, newDnsimpleChanges(dnsimpleDelete, changes.Delete)...)
  
  	return p.submitChanges(combinedChanges)
  }
docs: // ApplyChanges applies a given set of changes