code: def detect_svg(data, f):
      del f  # Unused.
      # Assume XML documents attached to image tag to be SVG.
      if data.startswith(b"<?xml ") or data.startswith(b"<svg "):
          return "svg"
  
imports: import imghdr
  import urllib.parse
  from werkzeug import wrappers
  from tensorboard import errors
  from tensorboard import plugin_util
  from tensorboard.backend import http_util
  from tensorboard.data import provider
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.image import metadata
label_desc: Use image node_id 1 for calling a global function with example usage: detect_svg(data, f) and returns: str