Ouzo\Utilities\Functions::compose PHP Method

    public static function compose($functionA, $functionB)
    {
        return function ($input) use($functionA, $functionB) {
            return Functions::call($functionA, Functions::call($functionB, $input));
        };
    }

 public function getFieldsAsString()
 {
     $fields = array_keys($this->_attributes);
     $escapedFields = Arrays::map($fields, Functions::compose(Functions::append("'"), Functions::prepend("'")));
     for ($index = self::FIELDS_COUNT_IN_LINE; $index < sizeof($escapedFields); $index += self::FIELDS_COUNT_IN_LINE) {
         $escapedFields[$index] = "\n\t\t\t" . $escapedFields[$index];
     }
     return implode(', ', $escapedFields);
 }