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type Cluster struct {
	Index    int
	Prefix   string
	Nodes    map[string]*Node
	Clusters map[string]*Cluster
}

type ClusterBuilder struct {
	Main  *Cluster
	Edges []Edge
	// contains filtered or unexported fields
}

type Edge struct {
	Send Port
	Recv Port
}

type Encoder struct{}

type Node struct {
	Name  string
	Extra string
	In    map[Port]struct{}
	Out   map[Port]struct{}
}

type Port struct {
	ir.PortAddr
}