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