def retrieve_flamegraph(local_directory, rev_num):
    execute(flamegraph.copy_flamegraph, local_directory=local_directory, rev_num=rev_num)
Retrieve each node's flamegraph data and svg to the given local directory.
dataset/ETHPy150Open datastax/cstar_perf/tool/cstar_perf/tool/benchmark.py/retrieve_flamegraph