code: def _build_option_description(k):
      """Builds a formatted description of a registered option and prints it"""
  
      o = _get_registered_option(k)
      d = _get_deprecated_option(k)
  
      s = u("{k} ").format(k=k)
  
      if o.doc:
          s += "\n".join(o.doc.strip().split("\n"))
      else:
          s += "No description available."
  
      if o:
          s += u(
              "\n    [default: {default}] [currently: {current}]"
          ).format(default=o.defval, current=_get_option(k, True))
  
      if d:
          s += u("\n    (Deprecated")
          s += u(", use `{rkey}` instead.").format(
              rkey=d.rkey if d.rkey else ""
          )
          s += u(")")
  
      s += "\n\n"
      return s
  
imports: from collections import namedtuple
  from contextlib import contextmanager
  import re
  import warnings
  import pandas.compat
  from pandas.compat import lmap, map, u
label_desc: Use image node_id 16 for calling a global function with example usage: _build_option_description(k) and returns: s