input: Write a function to create an instance of the "sru" class and search for records using the "search" method, providing a query string and optionally a collection name, start record number, maximum number of records to return, and record schema. The function should return a "response" object containing the search results if there are any, and False otherwise.
  assert sru_search("example query", "DPO")==True
  assert sru_search("nonexistent query", "GGC")==False
  assert sru_search("sample query", "ANP", startrecord=5, maximumrecords=10)==True
  assert sru_search("", "")==False
output: def sru_search(query, collection=None, startrecord=1, maximumrecords=10, recordschema=None):
      sru_instance = sru()
      response = sru_instance.search(query, collection, startrecord, maximumrecords, recordschema)
      if response:
          return response
      return False