You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: trace.rb
    path of file: ./repos/writing-a-compiler-in-ruby
    
    the code of the file until where you have to start completion: require 'stringio'

class Compiler

  # Generating trace output for debugging purposes

  def trace(pos,data,force=false)
    return false if !@trace && !force
    
    # A bit ugly, but prevents infinite recursion
    # if w
    
  def trace(pos,data,force=false)
    return false if !@trace && !force
    
    # A bit ugly, but prevents infinite recursion
    # if we accidentally calls anything "traceworthy":
    oldtrace = @trace
    @trace = false 

    # Save, to minimize risk of interfering with the
    # code.
    @e.pushl(:eax)
    @e.with_stack(2,true) do
        if pos
          pos = pos.short
        end
        sio = StringIO.new
        sio << "#{pos ? pos+":" : "  "} "

        if data.is_a?(String)
          sio << data << "\n"
        else
          print_sexp(data,sio,{:prune => true})
        end