method Node.isOverrideableimport { Node } from "https://dotland.deno.dev/x/fresh@1.1.1/src/dev/deps.ts"; isOverrideable<T extends Node>(node: T | undefined): node is OverrideableNode & OverrideableNodeExtensionType & TGets if the node is a OverrideableNode. Gets if the node is a OverrideableNode. Type ParametersT extends NodeParametersnode: T | undefined Node to check. Returnsnode is OverrideableNode & OverrideableNodeExtensionType & T