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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 get_send_command(self, send):
 		"""Internal helper function to get command that's really sent 		"""

		shutit_global.shutit_global_object.yield_to_draw()
		if send is None:
			return send
		cmd_arr = send.split()
		if cmd_arr and cmd_arr[0] in ('md5sum','sed','head'):
			newcmd = self.get_command(cmd_arr[0])
			send = send.replace(cmd_arr[0],newcmd)
		return send