text: """Implementation of Parser to parse config from logs."""
  
  from typing import Optional
  
  from ml_logger.parser import log as log_parser
  from ml_logger.parser.utils import parse_json
  from ml_logger.types import LogType, ParseLineFunctionType
  
  
  def parse_json_and_match_key(line: str) -> Optional[LogType]:
      """Parse a line as JSON string and check if it a valid log."""
      log = parse_json(line)
      if log:
          key = "logbook_type"
          if key not in log or log[key] != "config":
              log = None
      return log
  
  
  class Parser(log_parser.Parser):
      """Class to parse config from the logs."""
  
      def __init__(self, parse_line: ParseLineFunctionType = parse_json_and_match_key):
          """Class to parse config from the log.
  
          Args:
              parse_line (ParseLineFunctionType):
                  Function to parse a line in the log file. The function
                   should return None if the line is not a valid config (eg
                   error messages). Defaults to parse_json_and_match_key.
          """
          super().__init__(parse_line=parse_line)
          self.log_type = "config"
  