class_docstr: A single LookupTable instance.
  
  LookupTables offer a standardized interface, backed by the PersistenceDriver system in
  the background.
docstr: Initializes the LookupTable's underlying driver, if it has not yet been initialized.
docstr_tok: ["Initializes","the","LookupTable","'s","underlying","driver",",","if","it","has","not","yet","been","initialized","."]
code: def _initialize_if_necessary(self):
      """
      Initializes the LookupTable's underlying driver, if it has not yet been initialized.
      """
      if self._initialized:
          return
  
      self._initialized = True
      self._driver.initialize()
  
file_path: streamalert/streamalert/shared/lookup_tables/table.py
imports: from streamalert.shared.logger import get_logger
label_desc: Use image node_id 6 for calling the LookupTable obj's underlying member method code with example usage: obj._initialize_if_necessary() without return types