code: def modify(self, path, props=None, unset=None):
      from dvc_render.vega_templates import get_template
  
      props = props or {}
      template = props.get("template")
      if template:
          get_template(template, self.templates_dir)
  
      (out,) = self.repo.find_outs_by_path(path)
      if not out.plot and unset is not None:
          raise NotAPlotError(out)
  
      # This out will become a plot unless it is one already
      if not isinstance(out.plot, dict):
          out.plot = {}
  
      if unset:
          self._unset(out, unset)
  
      out.plot.update(props)
  
      # Empty dict will move it to non-plots
      if not out.plot:
          out.plot = True
  
      out.verify_metric()
      out.stage.dump(update_lock=False)
  
imports: import csv
  import io
  import os
  from collections import defaultdict
  from copy import deepcopy
  from functools import partial
  from multiprocessing import cpu_count
  from typing import TYPE_CHECKING, Any, Callable, Dict, Iterator, List, Optional, Set, Union
  import dpath
  import dpath.options
  from funcy import first, ldistinct, project, reraise
  from dvc.exceptions import DvcException
  from dvc.log import logger
  from dvc.utils import error_handler, errored_revisions
  from dvc.utils.objects import cached_property
  from dvc.utils.serialize import PARSERS, EncodingError
  from dvc.utils.threadpool import ThreadPoolExecutor
  from dvc_render.image import ImageRenderer
label_desc: Use image node_id 7 for calling the Plots obj's underlying member method code with example usage: obj.modify(path, props, unset) without return types