def killall(self, process_name, signal=None, as_root=False):  # pylint: disable=W0221
        for pid in self.get_pids_of(process_name):
            self.kill(pid, signal=signal, as_root=as_root)
https://familysearch.org/developers/docs/api/examples#parents-and-children
dataset/ETHPy150Open ARM-software/workload-automation/wlauto/common/linux/device.py/BaseLinuxDevice.killall--crossover with--dataset/ETHPy150Open AmEv7Fam/familysearch-python-sdk-opensource/familysearch/parentsAndChildren.py/ParentsAndChildren.__init__