src/ISOCurrencyProvider.php
public static function getInstance() : ISOCurrencyProvider
    {
        if (self::$instance === null) {
            self::$instance = new ISOCurrencyProvider();
        }

        return self::$instance;
    }
public static function getInstance() : ISOCurrencyProvider
    {
        if (self::$instance === null) {
            self::$instance = new ISOCurrencyProvider();
        }

        return self::$instance;
    }
public static function getInstance ( ) : ISOCurrencyProvider { if ( self :: $ instance === null ) { self :: $ instance = new ISOCurrencyProvider ( ) ; } return self :: $ instance ; }
Returns the singleton instance of ISOCurrencyProvider.

@return ISOCurrencyProvider
Returns the singleton instance of ISOCurrencyProvider .