code: def fetch(self, endpoint_name, identifier_input, query_params=None):
          
  
          endpoint_url = constants.URL_PREFIX + "/" + self._version + "/" + endpoint_name
  
          if query_params is None:
              query_params = {}
  
          if len(identifier_input) == 1:
              # If only one identifier specified, use a GET request
              query_params.update(identifier_input[0])
              return self._request_client.get(endpoint_url, query_params)
  
          # when more than one address, use a POST request
          return self._request_client.post(endpoint_url, identifier_input, query_params)
docs: Calls this instance's request_client's post method with the
          specified component endpoint
  
          Args:
              - endpoint_name (str) - The endpoint to call like "property/value".
              - identifier_input - One or more identifiers to request data for. An identifier can
                  be in one of these forms:
  
                  - A list of property identifier dicts:
                      - A property identifier dict can contain the following keys:
                        (address, zipcode, unit, city, state, slug, meta).
                        One of 'address' or 'slug' is required.
  
                        Ex: [{"address": "82 County Line Rd",
                             "zipcode": "72173",
                             "meta": "some ID"}]
  
                        A slug is a URL-safe string that identifies a property.
                        These are obtained from HouseCanary.
  
                        Ex: [{"slug": "123-Example-St-San-Francisco-CA-94105"}]
  
                  - A list of dicts representing a block:
                    - A block identifier dict can contain the following keys:
                        (block_id, num_bins, property_type, meta).
                        'block_id' is required.
  
                    Ex: [{"block_id": "060750615003005", "meta": "some ID"}]
  
                  - A list of dicts representing a zipcode:
  
                    Ex: [{"zipcode": "90274", "meta": "some ID"}]
  
                  - A list of dicts representing an MSA:
  
                    Ex: [{"msa": "41860", "meta": "some ID"}]
  
                  The "meta" field is always optional.
  
          Returns:
              A Response object, or the output of a custom OutputGenerator
              if one was specified in the constructor.