method Node.isFunctionTypeNodeimport { Node } from "https://deno.land/x/fresh@1.1.3/src/dev/deps.ts"; isFunctionTypeNode(node: Node | undefined): node is FunctionTypeNodeGets if the node is a FunctionTypeNode. Gets if the node is a FunctionTypeNode. Parametersnode: Node | undefined Node to check. Returnsnode is FunctionTypeNode