method Node.isNameableimport { Node } from "https://deno.land/x/fresh@1.6.1/src/dev/deps.ts"; isNameable<T extends Node>(node: T | undefined): node is NameableNode & NameableNodeExtensionType & TGets if the node is a NameableNode. Gets if the node is a NameableNode. Type ParametersT extends NodeParametersnode: T | undefinedReturnsnode is NameableNode & NameableNodeExtensionType & T