class_docstr: "A Printer to convert Python expressions to strings of JavaScript code
      
code: def _format_code(self, lines):
      return self.indent_code(lines)
  
imports: from __future__ import annotations
  from typing import Any
  from sympy.core import S
  from sympy.core.numbers import equal_valued
  from sympy.printing.codeprinter import CodePrinter
  from sympy.printing.precedence import precedence, PRECEDENCE
label_desc: Use image node_id 6 for calling the JavascriptCodePrinter obj's underlying member method code with example usage: obj._format_code(lines) and returns: self