code: def retrieve_paths(self, products, report_path, suffix=None):
          
          paths = []
          for product in products:
              path = ImpactReport.absolute_output_path(
                  join(report_path, 'output'),
                  products,
                  product.key)
              if isinstance(path, list):
                  for p in path:
                      paths.append(p)
              elif isinstance(path, dict):
                  for p in list(path.values()):
                      paths.append(p)
              else:
                  paths.append(path)
          if suffix:
              paths = [p for p in paths if p.endswith(suffix)]
  
          paths = [p for p in paths if exists(p)]
          return paths
docs: Helper method to retrieve path from particular report metadata.
  
          :param products: Report products.
          :type products: list
  
          :param report_path: Path of the IF output.
          :type report_path: str
  
          :param suffix: Expected output product file type (extension).
          :type suffix: str
  
          :return: List of absolute path of the output product.
          :rtype: list