# File lib/new_relic/collection_helper.rb, line 37
  def strip_nr_from_backtrace(backtrace)
    if backtrace && !Agent.config[:disable_backtrace_cleanup]
      # this is for 1.9.1, where strings no longer have Enumerable
      backtrace = backtrace.split("\n") if String === backtrace
      backtrace = backtrace.map(&:to_s)
      backtrace = backtrace.reject do |line|
        line.include?(NewRelic::Control.newrelic_root) or
        line =~ /^newrelic_rpm\s/
      end
      # rename methods back to their original state
      backtrace = backtrace.collect {|line| line.gsub(/_without_(newrelic|trace)/, "")}
    end
    backtrace
  end