Represents an async method as a directed graph. Control will enter through an "event" node, which can route signals through a network of other nodes that perform actions. Use <see cref="M:Facepunch.ActionGraphs.ActionGraph.CreateEmpty(Facepunch.ActionGraphs.NodeLibrary)" /> to create a completely blank graph, or <see cref="M:Facepunch.ActionGraphs.ActionGraph.Create``1(Facepunch.ActionGraphs.NodeLibrary)" /> to create a graph that handles an event matching the signature of a particular delegate.