code: def current(config: Config, verbose: bool = False) -> None:
      """Display the current revision for a database.
  
      :param config: a :class:`.Config` instance.
  
      :param verbose: output in verbose mode.
  
      """
  
      script = ScriptDirectory.from_config(config)
  
      def display_version(rev, context):
          if verbose:
              config.print_stdout(
                  "Current revision(s) for %s:",
                  util.obfuscate_url_pw(context.connection.engine.url),
              )
          for rev in script.get_all_current(rev):
              config.print_stdout(rev.cmd_format(verbose))
  
          return []
  
      with EnvironmentContext(
          config, script, fn=display_version, dont_mutate=True
      ):
          script.run_env()
  
imports: from __future__ import annotations
  import os
  from typing import List
  from typing import Optional
  from typing import TYPE_CHECKING
  from typing import Union
  from .None import autogenerate
  from .None import util
  from .runtime.environment import EnvironmentContext
  from .script import ScriptDirectory
label_desc: Use image node_id 12 for calling a global function with example usage: current(config, verbose) and returns: list