| 1234567891011121314151617181920212223242526 | package contextimport (	"context"	"fmt"	"google.golang.org/grpc/metadata")func AppendToContext(ctx context.Context, key string, value interface{}) context.Context {	ctx = context.WithValue(ctx, key, value)	_value := ""	switch value.(type) {	case []byte:		_value = string(value.([]byte))		break	case string:		_value = value.(string)		break	default:		_value = fmt.Sprint(value)		break	}	ctx = metadata.AppendToOutgoingContext(ctx, key, _value)	return ctx}
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