text: '''
  Helper methods which are used within SDK.
  '''
  
  
  def prepare_payload(parameters: dict) -> dict:
      ''' Prepares payload for request based on provided parameters by removing
          unnecessary or protected variables and removing `None` values. Please
          note that main use is to pass `locals()` as `parameters`.
  
          Args:
              parameters (dict): parameters provided as key -> value pairs.
  
          Returns:
              dict: payload object without unnecessary items to be used in requests.
      '''
      return {
          key: value
          for key, value in parameters.items()
          if key not in ['self', 'payload', 'headers', 'date_to', 'date_from']
          and value is not None
      }
  