func (c *cAClient) GetUnlockKey(ctx context.Context, in *GetUnlockKeyRequest, opts ...grpc.CallOption) (*GetUnlockKeyResponse, error) {
    out := new(GetUnlockKeyResponse)
    err := c.cc.Invoke(ctx, "/docker.swarmkit.v1.CA/GetUnlockKey", in, out, opts...)
    if err != nil {
        return nil, err