dag

type Graph struct {
	// Nodes represent map of PipelineTask name to Node in Pipeline Graph
	Nodes map[string]*Node
}

type Node struct {
	// Key represent a unique name of the node in a graph
	Key string
	// Prev represent all the Previous task Nodes for the current Task
	Prev []*Node
	// Next represent all the Next task Nodes for the current Task
	Next []*Node
}

type Task interface {
	HashKey() string
	Deps() []string
}

type Tasks interface {
	Items() []Task
}