'Sends a command to all server nodes.
Sending command to a server node will cause that server node to invoke
``KVStoreServer.controller`` to execute the command.
This function returns after the command has been executed on all server
nodes.
Parameters
head : int
the head of the command.
body : str
the body of the command.'

def _send_command_to_servers(self, head, body):

    check_call(_LIB.MXKVStoreSendCommmandToServers(self.handle, mx_uint(head), c_str(body)))
