## is_iban
```mermaid
%%{init: {
'theme': 'base',
'themeVariables': {
'fontSize': '11px',
'nodePadding': '1',
'nodeBorder': '1',
'lineWidth': '0.8',
'fontFamily': 'Arial'
}
}}%%
flowchart LR
Start(( )) --> is_iban
is_iban -->| | IS_IBAN
IS_IBAN --> End(( ))
```