input: 
  def query_sru(query_string: str, collection_name: str = None, start_record: int = 1, max_records: int = 1, record_schema: str = None) -> response:
      """
      Query the KB SRU API with the given parameters and return a response object with the search results.
      
      >>> query_sru("sample query", "GGC", 1, 10, "dcx")
      <KB_SRU.response object at 0x7f9b8c0b8e50>
      """
  
output:     from KB_SRU import SRUClient
  
      client = SRUClient()
      response = client.search(query_string, collection_name, start_record, max_records, record_schema)
      return response