method Node.isUnionTypeNodeimport { Node } from "https://deno.land/x/fresh@1.1.3/src/dev/deps.ts"; isUnionTypeNode(node: Node | undefined): node is UnionTypeNodeGets if the node is a UnionTypeNode. Gets if the node is a UnionTypeNode. Parametersnode: Node | undefined Node to check. Returnsnode is UnionTypeNode