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: helpers.rb
    path of file: ./repos/capybara/lib/capybara
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Capybara
  # @api private
  module 
    
    def filter_backtrace(trace)
      return 'No backtrace' unless trace

      filter = %r{lib/capybara/|lib/rspec/|lib/minitest/|delegate.rb}
      new_trace = trace.take_while { |line| line !~ filter }
      new_trace = trace.grep_v(filter) if new_trace.empty?
      new_trace = trace.dup if new_trace.empty?

      new_trace.first.split(':in ', 2).first
    end