object(TypeError)#81 (7) {
  ["message":protected]=>
  string(63) "usort(): Argument #1 ($array) must be of type array, null given"
  ["string":"Error":private]=>
  string(0) ""
  ["code":protected]=>
  int(0)
  ["file":protected]=>
  string(48) "/srv/_data/_www/public/models/SimilarProduct.php"
  ["line":protected]=>
  int(131)
  ["trace":"Error":private]=>
  array(9) {
    [0]=>
    array(3) {
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      ["line"]=>
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      ["function"]=>
      string(5) "usort"
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      ["line"]=>
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      ["class"]=>
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    array(5) {
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      ["function"]=>
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      ["class"]=>
      string(8) "core\Web"
      ["type"]=>
      string(2) "->"
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  ["previous":"Error":private]=>
  NULL
}