code: private function getArgumentIndices(Tokens $tokens, $functionNameIndex)
      {
          $argumentsAnalyzer = new ArgumentsAnalyzer();
  
          $openParenthesis = $tokens->getNextTokenOfKind($functionNameIndex, ['(']);
          $closeParenthesis = $tokens->findBlockEnd(Tokens::BLOCK_TYPE_PARENTHESIS_BRACE, $openParenthesis);
  
          $indices = [];
  
          foreach ($argumentsAnalyzer->getArguments($tokens, $openParenthesis, $closeParenthesis) as $startIndexCandidate => $endIndex) {
              $indices[$tokens->getNextMeaningfulToken($startIndexCandidate - 1)] = $tokens->getPrevMeaningfulToken($endIndex + 1);
          }
  
          return $indices;
      }
docs: @param Tokens $tokens
  @param int    $functionNameIndex
  
  @return array<int, int> In the format: startIndex => endIndex