code: def _run_to_diff(ctx):
      runs = runs_support.runs_for_ctx(ctx)
      return runs[0] if runs else None
  
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 7 for calling a global function with example usage: _run_to_diff(ctx) and returns: unknown