func (h HandlerFunc) Handle(ctx context.Context, req interface{}) (interface{}, error) {
	return h(ctx, req)
}
Handle is the implementation of the Handler interface for a HandlerFunc
package rpc
import "context"
type Handler interface {
	Handle(ctx context.Context, req interface{}) (interface{}, error)
}
type HandlerFunc func(ctx context.Context, req interface{}) (interface{}, error)