передача функции как аргумента другой функции

go-demo-4/account/vault.go

@@ -73,10 +73,10 @@ func (vault *Vault) ToBytes() ([]byte, error) {
 	return file, nil
 }
 
-func (vault *VaultWithDb) FindAccountsByUrl(url string) []Account {
+func (vault *VaultWithDb) FindAccounts(str string, checker func(Account, string) bool) []Account {
 	var accounts []Account
 	for _, account := range vault.Accounts {
-		isMatched := strings.Contains(account.Url, url)
+		isMatched := checker(account, str)
 		if isMatched {
 			accounts = append(accounts, account)
 		}