# File lib/brakeman/processors/alias_processor.rb, line 57
  def process_default exp
    @exp_context.push exp

    begin
      exp.map! do |e|
        if sexp? e and not e.empty?
          process e
        else
          e
        end
      end
    rescue => err
      @tracker.error err if @tracker
    end

    result = replace(exp)

    @exp_context.pop

    result
  end