class_docstr: Footnote Extension. 
class_docstr_tok: ["Footnote","Extension","."]
docstr: Return footnote back-link id. 
docstr_tok: ["Return","footnote","back-link","id","."]
code: def makeFootnoteRefId(self, id: str, found: bool = False) -> str:
      """Return footnote back-link id."""
      if self.getConfig("UNIQUE_IDS"):
          return self.unique_ref(
              "fnref%s%d-%s"
              % (self.get_separator(), self.unique_prefix, id),
              found,
          )
      else:
          return self.unique_ref(
              "fnref{}{}".format(self.get_separator(), id), found
          )
  
imports: from __future__ import annotations
  from .None import Extension
  from ..blockprocessors import BlockProcessor
  from ..inlinepatterns import InlineProcessor
  from ..treeprocessors import Treeprocessor
  from ..postprocessors import Postprocessor
  from ..None import util
  from collections import OrderedDict
  import re
  import copy
  import xml.etree.ElementTree
label_desc: Use image node_id 9 for calling the FootnoteExtension obj's underlying member method code with example usage: obj.makeFootnoteRefId(id, found) and returns: self, self