func (c *PipelineClient) PendingRequests() int {
	c.connClientsLock.Lock()
	n := 0
	for _, cc := range c.connClients {
		n += cc.PendingRequests()
	}
	c.connClientsLock.Unlock()
	return n
}
func (c *PipelineClient) PendingRequests() int {
	c.connClientsLock.Lock()
	n := 0
	for _, cc := range c.connClients {
		n += cc.PendingRequests()
	}
	c.connClientsLock.Unlock()
	return n
}
// PendingRequests returns the current number of pending requests pipelined
// to the server.
//
// This number may exceed MaxPendingRequests*MaxConns by up to two times, since
// each connection to the server may keep up to MaxPendingRequests requests
// in the queue before sending them to the server.
//
// This function may be used for balancing load among multiple PipelineClient
// instances.