docstr: Get the name of the VAE file.
code: def get_vae_filename(self):
      """Get the name of the VAE file."""
  
      import modules.sd_vae as sd_vae
  
      if sd_vae.loaded_vae_file is None:
          return "NoneType"
  
      file_name = os.path.basename(sd_vae.loaded_vae_file)
      split_file_name = file_name.split(".")
      if len(split_file_name) > 1 and split_file_name[0] == "":
          return split_file_name[
              1
          ]  # if the first character of the filename is "." then [1] is obtained.
      else:
          return split_file_name[0]
  
imports: from __future__ import annotations
  import datetime
  import pytz
  import io
  import math
  import os
  from collections import namedtuple
  import re
  import numpy
  import piexif
  import piexif.helper
  from PIL import Image, ImageFont, ImageDraw, ImageColor, PngImagePlugin
  import string
  import json
  import hashlib
  from modules import sd_samplers, shared, script_callbacks, errors
  from modules.paths_internal import roboto_ttf_file
  from modules.shared import opts
label_desc: Use image node_id 2 for calling the FilenameGenerator obj's underlying member method code with example usage: obj.get_vae_filename() and returns: str, split_file_name, split_file_name