type CacheOptionsEntry = gw.CacheOptionsEntry

type Frontend interface {
	Solve(ctx context.Context, llb FrontendLLBBridge, opt map[string]string, inputs map[string]*pb.Definition, sid string, sm *session.Manager) (*Result, error)
}

type FrontendLLBBridge interface {
	Solve(ctx context.Context, req SolveRequest, sid string) (*Result, error)
	ResolveImageConfig(ctx context.Context, ref string, opt llb.ResolveImageConfigOpt) (digest.Digest, []byte, error)
}

type Result struct {
	Ref      solver.ResultProxy
	Refs     map[string]solver.ResultProxy
	Metadata map[string][]byte
}

type SolveRequest = gw.SolveRequest