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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def clone_source_dir(source_dir, dest_dir):
 """Copies the source Protobuf files into a build directory. Args: source_dir (str):
 source directory of the Protobuf files dest_dir (str):
 destination directory of the Protobuf files """

    if os.path.isdir(dest_dir):
        print('removing', dest_dir)
        shutil.rmtree(dest_dir)
    shutil.copytree(source_dir, dest_dir)