method Node.isOverrideableimport { Node } from "https://dotland.deno.dev/x/fresh@1.7.3/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 | undefinedReturnsnode is OverrideableNode & OverrideableNodeExtensionType & T