code: def format_line(self, line: Line) -> str:
      result = ""
      if self.current_line_indicator:
          if line.is_current:
              result = self.current_line_indicator
          else:
              result = " " * len(self.current_line_indicator)
          result += " "
      else:
          result = "   "
  
      if self.show_linenos:
          result += self.line_number_format_string.format(line.lineno)
  
      prefix = result
  
      result += (
          line.render(
              pygmented=self.pygmented,
              escape_html=self.html,
              strip_leading_indent=self.strip_leading_indent,
          )
          + "\n"
      )
  
      if self.show_executing_node and not self.pygmented:
          for line_range in line.executing_node_ranges:
              start = line_range.start - line.leading_indent
              end = line_range.end - line.leading_indent
              # if end <= start, we have an empty line inside a highlighted
              # block of code. In this case, we need to avoid inserting
              # an extra blank line with no markers present.
              if end > start:
                  result += (
                      " " * (start + len(prefix))
                      + self.executing_node_underline * (end - start)
                      + "\n"
                  )
      return result
  
imports: import inspect
  import sys
  import traceback
  from types import FrameType, TracebackType
  from typing import Union, Iterable
  from stack_data import style_with_executing_node, Options, Line, FrameInfo, LINE_GAP, Variable, RepeatedFrames, BlankLineRange, BlankLines
  from stack_data.utils import assert_
label_desc: Use image node_id 12 for calling the Formatter obj's underlying member method code with example usage: obj.format_line(line) and returns: result