class RubyProf::CallInfoPrinter

def print_header(thread)
  @output << "----------------------------------------------------\n"
  @output << "Thread ID: #{thread.id}\n"
  @output << "Fiber ID: #{thread.fiber_id}\n"
  @output << "Total Time: #{thread.total_time}\n"
  @output << "Sort by: #{sort_method}\n"
  @output << "\n"
end