Service/CompressionManager.php
public function getSelectedCompressionMethods(array $selected_compression_methods)
    {
        $result = [];
        foreach ($selected_compression_methods as $method) {
            Assertion::keyExists($this->compression_methods, $method, sprintf('The compression method "%s" is not supported.', $method));
            $result[] = $this->compression_methods[$method];
        }

        return $result;
    }
public function getSelectedCompressionMethods(array $selected_compression_methods)
    {
        $result = [];
        foreach ($selected_compression_methods as $method) {
            Assertion::keyExists($this->compression_methods, $method, sprintf('The compression method "%s" is not supported.', $method));
            $result[] = $this->compression_methods[$method];
        }

        return $result;
    }
@param string[] $selected_compression_methods

@return \Jose\Compression\CompressionInterface[]