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