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<?php namespace Example\Model; class Country { /** @var array<array<string, string>> */ private array $countries = []; public function __construct() { // grab the data we need and store it off	$csvReader = new \Example\Model\CSVReader($_SERVER['DOCUMENT_ROOT'] . '/countries.csv', true); foreach ($csvReader as $index => $country)	{	$country['index'] = $index; $this->countries[$index] = $country;	}	} /** @return array<array<string, string>> */ public function getCountries() : array { return $this->countries;	} /** @return array<string, string> */ public function getCountry(int $index) : array { return $this->countries[$index] ?? [];	} /** @return array<string, array<int, array<string, string>>> */ public function getFiltered(callable $filter) : array {	$filtered = []; foreach ($this->countries as $country)	{ if (\call_user_func($filter, $country['Country']))	{	$filtered[$country['Country'][0]][] = $country;	}	} return $filtered;	} /** * @param array<int> $selected * * @return array<string, array<int, array<string, string>>> */ public function getSelected(array $selected) : array {	$group = []; foreach($selected as $index)	{	$group[$this->countries[$index]['Country'][0]][] = $this->countries[$index];	}	\ksort($group); return $group;	}	}