code: def _ac_path(ctx, _param, incomplete):
      if ctx.params.get("remote"):
          return []
      if _has_non_path_options(ctx.params):
          return []
      _apply_default_runs_for_diff(ctx)
      dir_base = _diff_run_dir_base(ctx)
      if not dir_base:
          return []
      return ac_support.ac_run_filepath(dir_base, incomplete)
  
file_path: guildai/guild/commands/runs_diff.py
imports: import os
  import click
  from guild import click_util
  from .None import ac_support
  from .None import remote_support
  from .None import runs_support
label_desc: Use image node_id 2 for calling a global function with example usage: _ac_path(ctx, _param, incomplete) and returns: ac_support, list, list, list