code: def _add_leveldb_option(config: ConfigParser, leveldb_fallback_dir: str) -> None:
          
          config.set("defaults", "#Default chaindata locations:", "")
          config.set("defaults", "#– Mac: ~/Library/Ethereum/geth/chaindata", "")
          config.set("defaults", "#– Linux: ~/.ethereum/geth/chaindata", "")
          config.set(
              "defaults",
              "#– Windows: %USERPROFILE%\\AppData\\Roaming\\Ethereum\\geth\\chaindata",
              "",
          )
          config.set("defaults", "leveldb_dir", leveldb_fallback_dir)
docs: Sets a default leveldb path in .mythril/config.ini file
          :param config: The config file object
          :param leveldb_fallback_dir: The leveldb dir to use by default for searches
          :return: None