method Node.isAbstractableimport { Node } from "https://dotland.deno.dev/x/fresh@1.1.5/src/dev/deps.ts"; isAbstractable<T extends Node>(node: T | undefined): node is AbstractableNode & AbstractableNodeExtensionType & TGets if the node is an AbstractableNode. Gets if the node is an AbstractableNode. Type ParametersT extends NodeParametersnode: T | undefined Node to check. Returnsnode is AbstractableNode & AbstractableNodeExtensionType & T