150 def calculate_samples_count_per_callchain(callchains):  argument
152   for callchain in callchains:
158 def calculate_samples_count_per_handler(callchains):  argument
163   for callchain in callchains:
169 def write_flamegraph_input_file(output_stream, callchains):  argument
170   for callchain, count in calculate_samples_count_per_callchain(callchains):
174 def write_handlers_report(output_stream, callchains):  argument
175   handler_counters = calculate_samples_count_per_handler(callchains)
248   callchains = collapsed_callchains_generator(
254     write_flamegraph_input_file(program_options.output_stream, callchains)
256     write_handlers_report(program_options.output_stream, callchains)