def to_ary
      lines.take(1000).map { |l| { :number => l.filtered_number, :file => l.filtered_file, :method => l.filtered_method, :source => l.source } }
    end
def to_ary
      lines.take(1000).map { |l| { :number => l.filtered_number, :file => l.filtered_file, :method => l.filtered_method, :source => l.source } }
    end
Convert Backtrace to arry.

 Returns array containing backtrace lines.