code: def is_quarto_document(opspec):
      return os.path.isfile(opspec) and opspec[-4:] == ".qmd"
  
file_path: guildai/guild/plugins/quarto_document.py
imports: import logging
  import os
  import yaml
  from guild import config
  from guild import guildfile
  from guild import model
  from guild import plugin
label_desc: Use image node_id 4 for calling a global function with example usage: is_quarto_document(opspec) and returns: unknown