def _run_systemdrun_decide(self):
if self.systemd_wait_support is None:<EOL><INDENT>self.systemd_wait_support = "<STR_LIT>" in run_cmd(<EOL>["<STR_LIT>", "<STR_LIT>"], return_output=True)<EOL><DEDENT>return self.systemd_wait_support<EOL>
Internal method
decide if it is possible to use --wait option to systemd
for example RHEL7 does not support --wait option

:return: bool