func (k *Client) Close() {
	k.connection.Close()
}
Close closes the underlying gRPC connection to KMS Plugin.
package kmspluginclient
import (
	"fmt"
	"net"
	"net/url"
	"strings"
	"time"
	"github.com/GoogleCloudPlatform/k8s-cloudkms-plugin/plugin"
	"google.golang.org/grpc"
)
type Client struct {
	plugin.KeyManagementServiceClient
	connection *grpc.ClientConn
}