class_docstr: A key-value store for synchronization of values, over multiple devices.
class_docstr_tok: ["A","key-value","store","for","synchronization","of","values",",","over","multiple","devices","."]
docstr: 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.
docstr_tok: ["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","."]
code: def _send_command_to_servers(self, head, body):
      """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.
      """
      check_call(
          _LIB.MXKVStoreSendCommmandToServers(
              self.handle, mx_uint(head), c_str(body)
          )
      )
  
imports: import pickle
  import ctypes
  import os
  from ..ndarray import NDArray
  from ..ndarray import _ndarray_cls
  from ..base import _LIB, c_str
  from ..base import check_call, mx_uint, py_str
  from ..base import NDArrayHandle, KVStoreHandle
  from ..None import optimizer
  from .base import _ctype_key_value, _ctype_dict, KVStoreBase
label_desc: Use image node_id 19 for calling the KVStore obj's underlying member method code with example usage: obj._send_command_to_servers(head, body) without return types