method Node.isOverrideableimport { Node } from "https://deno.land/x/fresh@1.1.5/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